4. Orgasms can help men get over colds faster.

One study, admittedly with a very small sample of 11 men, asked men to masturbate to orgasm. Blood was drawn throughout the process, and researchers found that sexual arousal and orgasm increased the presence of leukocytes, a "killer" cell that boosts the immune system. This helps you get over your colds faster.

5. Orgasms relieve pain.

"There is some evidence that orgasms can relieve all kinds of pain, including pain from arthritis, pain after surgery and even pain during childbirth," said Lisa Stern, a nurse practitioner who works with Planned Parenthood, in an interview with Woman's Day earlier this month. This is a result of pain-killing oxytocin.

6. A man's orgasm can make women less depressed.

Okay, this is a very controversial finding, but in a study of college students in relationships at the State University of New York in Albany found that women who had sex without condoms were less likely to be depressed than those who used protection or abstained from sex. Of course, I don't recommend having unprotected sex with people with whom you are not tested and fully monogamous.