Maybe Marvin Gaye was on to something...

The next time she's not in the mood because of a headache, backache, or toe-ache, try this little known trick for swaying the female mind -- reason with her. Counter her complaints with "Honey, I know you're in pain, but during orgasm you can actually tolerate 110% more pain. So take two aspirin and climb into bed."

And you won't even be lying to get a woman into bed with you.
So for the benefit of your health, and a healthy sex life, here are 10 more reasons sex is good for you.

1. The Prozac Effect - Sex releases endorphins, which help to elevate moods and reduce stress. Sex has even been shown to be 10 times more effective than valium -- and you don't have to check whether it's covered by your HMO.

2. The Stair-Master Effect - Having sex actually burns about 200 calories, the equivalent of being chased for half an hour. So sex three times a week burns around 1500 calories a year -- the equivalent of jogging 75 miles. Hmm...choice between running from LA to Santa Barbara or getting it on...let's think about it for a minute... (No wonder "Men's Health" named "the bed" the greatest piece of exercise equipment ever.)

3. The Aspirin Effect - Dr. Beverly Whipple of Rutgers University, who identified the female G spot in the 1970's, (special thanks to her) discovered that gentle pressure on the G spot raised pain thresholds by 40%, escalating to 110% during orgasm. During peak arousal the pain-killing center in the midbrain is activated, releasing endorphins and corticosteroids, which numb nerve endings for several minutes.

4. The Bloodhound Effect - After sex, production of the hormone prolactin surges, which causes stem cells in the brain to develop new neurons in the brain's olfactory bulb. In English -- it improves your sense of smell.

5. The Depends Effect - Know those glorious Kegel muscles women contract during sex? Well they're the same ones used to halt the flow of urine. Sexy, huh?