Ever wonder why your guy rolls over and starts snoring right after making love? Billy Goldberg, M.D., co-author of Why Do Men Fall Asleep After Sex?, may found have the answer.

"After orgasm, both men and women release the chemicals oxytocin, prolactin, gamma amino butyric acid (GABA), and endorphins. Each of these contributes to that roll-over-and-snore feeling," says Goldberg.

But since both sexes release the same post-climax hormones, but why is the after-nooky snooze more of a guy trait? It's likely because women don't always have orgasms during sex, and hence, don't always release the sleep-inducing hormones. "If that's true, then you have your answer as to why men fall asleep after sex," he adds.

Squeeze your way to better sex! The optimum way to achieve better orgasms is to strengthen and tighten your pelvic floor -- the actual muscles that do the most work during sex. "This is the group of six muscles that control and hold in place all of the holes in that area: The urethra, vagina and anus," explains Marcelle Perks, author of Incredible Orgasms, and strengthening these muscles -- also called PC muscles -- increases arousal rate, sensations and stamina.

About a third of all women have weak pelvic floors, according to Perks, so that means a lot of us have room for improvement. Try these discreet sexercises you can do anywhere -- whether you're at your desk, in your car or waiting in line. Build up to completing these three times a day: The more you practice, the faster you'll see (and feel) results.

Kegel hold. While seated, squeeze your pelvic-floor muscles and hold for 5 to 10 seconds, then release. "The best way to find your PCs is to put a finger in your vagina and clench your muscles. You should be able to feel pressure on your finger," Perks says. But you can also easily locate these muscles by pretending you're holding back urine. Do 5 to 10 times.

Kegel pulse. While sitting, squeeze and release the pelvic-floor muscles quickly for 5 to 10 times.

Inner-thigh squeeze. Sit on a chair (at a desk to be discreet). Squeeze your knees together as you contract and release your pelvic-floor muscles. Do 3 to 5 reps.

Standing Kegels. Do the Kegel hold and Kegel pulse moves again, this time standing upright. Do 5 to 10 reps for each.

If you have sexual fantasies, you're among the 85 percent of adult women who do, according to Brett Kahr, a British psychotherapist and author of Who's Been Sleeping In Your Head: The Secret World of Sexual Fantasies.

Kahr, who conducted a large-scale study of the sexual fantasies of 23,000 adults, reveals the many people fantasize as a way to fulfill often unconscious psychological needs, and a means of exploring sexual activities inaccessible in real life. "They play and important role in boosting libido, improving relationships, and can have a therapeutic effect on our moods and confidence," says Kahr. Some surprising findings from his survey:

Meet the new hot spot on your pleasure map: It's called the anterior fornix erogenous (AFE) zone or A-spot. "It is the smooth area midway between a woman's cervix and G-spot, on the front wall of the vagina, that appears as a spongy, wrinkled, scrotal-like swelling and is extremely sensitive to stimulating touch," explains Yvonne K. Fulbright, Ph.D., a sexologist and author of Touch Me There!

Stimulating this nerve-packed hot spot delivers pleasurable sensations and produces lubrication, which add up to explosive orgasms. It's also beneficial for couples who experience vaginal dryness during sex. You can locate your A-spot yourself, but it's much more fun exploring with your partner! Here's how to find it:

Lying on your back with your knees up, insert a finger into your vagina and slide along the front wall until you feel your cervix (which feels like the tip of your nose). Move your finger to feel the spongy area between your cervix and the front vaginal wall, using a firm, repeated in-out motion to stroke the entire length. When you feel a wave of pleasurable sensation, you know you've hit the spot!

Missionary sex may have a rep for being old-fashioned or boring, but it remains a staple position couples fall back on, simply because it feels so good for both partners. Plus, if you're self-conscious about your body, the missionary position will make you feel more confident -- you're reclined with your partner's body covering yours, so all his focus will be on your sensuous eyes and sexy parted lips, versus those jiggly bits that'll be in full view when you're on top.

By changing your position slightly, you can alter the kind of stimulation you receive. Some va-va-vroom variants to try:

Your legs bent with knees up

This allows a deeper penetration, which means more pressure in the back part of your vagina. 

Keep your legs together

You'll hug his penis more tightly, giving you a better clitoral stimulation. 

Your legs over his shoulders

This gives a very deep penetration, giving more friction and stimulation to the G-spot.

Pillow under your hips

This raises your pelvis, increasing clitoral stimulation.

If you feel like faking a headache when your partner wants sex, think again! Making love actually has many hidden health benefits -- migraine relief included!

Sex eases migraines

Almost 50 percent of women report post-nooky migraine relief, according to Randolph W. Evans, M.D., clinical professor of neurology at the Baylor College of Medicine in Houston. Evans believes that the release of morphine-like pain relief endorphins after sex aids to relieve or reduce migraine headaches.

Sex improves your immune system

According to a study by Wilkes University in Pennsylvania, people who have intercourse at least once a week show a 30 percent increase of the antibody immunoglobulin A, IgA, your body's first line of defense against colds and flus.

Sex reduces stress

A study by Biological Psychology found that people who have sex have lower blood pressure than those who abstain. It is believed that sexual activity creates a calming effect that lasts at least a week.

Sex cuts your endometriosis risk

Women who orgasm frequently are less likely to develop endometriosis, says Harvey Kliman, M.D., a researcher at the Yale University School of Medicine, who conducted the study to explore the effects of orgasm on endometriosis. Kliman believes this is due to uterine contractions which push out debris that might otherwise go back into the fallopian tubes.

Sex boosts your bladder control

Squeezing your pubococcygeus muscles -- the ones you use to stop the flow of urine -- during sex not only helps you achieve the big O, it also strengthens your bladder control.

Question: My boyfriend and I are looking for ways to explore using food in sex play. Any suggestions?

Think about the ways you can stimulate the five senses. Here's some food for thought:

Licking tasty treats like chocolate syrup and honey off each other's erogenous zones are a favorite among couples. But you can up the experience a notch by incorporating a little sensory deprivation: If you haven't tried already, you can take turns to blindfold each other while you relish every inch of your partner's body. The lack of sight, the feeling of not knowing when and where you're going to lick next can make the experience intensely erotic.

A reminder, though: It's best to keep sugar-based foods off your tender private parts. Sugar encourages the growth of yeast and bacteria, so use sweetened syrup and beverages only on other parts of the body.

If you're adventurous enough, some foods such as cucumbers can be used for insertion play. Make sure there are no rough surfaces, and always use lube and condom for protection. Keep oily foods away from condoms as oil can break down the latex.

Ice is another favorite. You can add the element of scent into your foreplay, simply by putting a drop of food essence (like strawberry essence) in water before freezing. Take the ice cube into your mouth, before you give each other oral pleasure, for simultaneous sensations of hot and cold.

The menu is really up to your imagination -- have fun experimenting!

You probably know most of the sexual hotspots on you and your guy. But here are some lesser-known erogenous zones that pack pleasure potential, say sexperts.

The Small of Your Back

We all have a sexual hotspot located just below the coccyx (the vertebrae in the small of your back, right above your buttocks). This area contains sacral nerves, which when slowly massaged, heighten sensations around the groin.

Move to try: Lie on your stomach and have your partner wiggle his finger there slowly but firmly.

Your Ankles

In Chinese acupressure, the sunken spot between ankle and Achilles tendon is known as "the bigger stream". Stimulating "the bigger stream" releases feelings of pleasure throughout your body.

Move to try: Place two fingers on the area and firmly rub for 30 seconds.

Your Nose

Your sniffer is richly packed with nerve endings, and your nasal passages contain erectile tissue that increases sensitivity when aroused.

Move to try: Nibble on the tip of his nose. 

The Soles of Your Feet

Neurologically, the feet and sexual organ areas criss-cross the same neural pathways, making your soles of your feet a super-big erogenous zone.

Move to try: Press on a spot on the bottom of your man's foot, about one-third of the way down from the third toe. It's an acupressure point called "the Bubbling Spring" -- pressing and holding this spot for a few seconds can releases sexual energy.

Just the other day, I was hanging out with one of my girlfriends, Giselle. We were talking about nothing in particular, but one topic led to another and the subject on nudity came up. "Which guy wouldn't love the sight of his woman naked?" Giselle remarked rhetorically.

That may be true, but it got us wondering what's sexier than taking everything off. After asking the men, here's what I got: Keeping some bits covered up is often sexier than going totally naked. The implied nudity probably adds to a sense of mystery, and his imagination can do the rest and, ahem,  fill in the blanks.

Here are the sexiest outfits that drive men wild:

"The sight of my girlfriend walking around in nothing but her garter belt -- it makes me want to have my way with her right then and there." -- Max, 27

"My wife in her satin slip. Brazilian waxed." -- Lo, 33

"A see-through mesh bra is an instant turn-on." -- Jeremy, 25

"When a woman wears nothing but a pair of killer heels that says she wants to take control." -- AJ, 29

"A low-cut dress." -- Vincent, 39

"I love it when my wife wears my white shirt, braless." -- Bryan, 32

"There was once my girlfriend went out with me wearing a very tight skirt. Then she whispered in my ear that she wasn't wearing any underwear." -- Gary, 26

Yes, you read right. Men have what many sexperts describe as the male equivalent of a woman's G-spot, and few males are even aware of this pleasure zone in them. It's called the prostate, a walnut-sized gland surrounding the urethra which creates the fluid secretions in semen. And when stimulated right, it is capable of giving your man explosive Os.

Hot move to try: Wrap your hand around his erect shaft and then move it toward his body instead of the usual up-and-down motion. Manually stimulating his penis this way causes its erectile tissue to press against the prostate (which lies just behind). You're basically stimulating his two hottest spots at the same time!