29 October 2012, 01:51 PM ET
Debate heats up over whether women in their fertile phase prefer more butch men.
09 October 2012, 05:10 PM ET
Unusual facts about male sex cells.
08 October 2012, 08:07 AM ET
For some organisms, short penises may not do the trick.
01 October 2012, 10:54 AM ET
Assuming that men should dominate sexually might make you less confident and less safe during sex.
12 September 2012, 05:01 PM ET
Perhaps this "no-disgust" ability doesn't work in women with sexual pain disorders.
07 September 2012, 12:23 PM ET
Research in rats suggests an alternative to Viagra.
05 September 2012, 12:21 PM ET
Anxiety about sexual communication may kill the mood.
20 August 2012, 03:01 PM ET
The substance may hint at human infertility causes.
15 August 2012, 01:21 PM ET
U.S. swimmer Ryan Lochte has said that 70 to 75 percent of Olympians have sex during the Games. Olympic athletes are compelled to copulation by something even stronger than looks, experts say.
09 August 2012, 08:15 AM ET
Journalists and scientists should avoid drawing human conclusions from animal studies, they say.
07 August 2012, 07:01 PM ET
Genders battle it out over generations.
03 August 2012, 05:00 PM ET
Pupils reveal the secrets of attraction.
24 July 2012, 01:18 PM ET
Sexual objectification begins with how men and women are processed in the brain.
19 July 2012, 12:00 PM ET
Wide variety found in one man's sperm.
29 June 2012, 03:17 PM ET
What drives female sexuality after childbirth?
22 June 2012, 08:13 AM ET
Testosterone's effects on sexual desire are complex.
06 June 2012, 04:45 PM ET
Advertisers are turning to bare skin to catch eyes.
01 June 2012, 10:07 AM ET
While not the most efficient way to reproduce, sex has other benefits as well.
31 May 2012, 05:41 PM ET
Partner's porn use may affect women's self-esteem.
25 May 2012, 01:46 PM ET
The gender of a leader can influence how their mistakes are received, a study indicates.
14 May 2012, 08:19 AM ET
Study links certain sexual acts with pleasure during condom use.
10 May 2012, 02:54 PM ET
Men with open gazes are viewed more favorably than the heavy-lidded sort.
07 May 2012, 03:00 PM ET
They tend to overshoot sharp turns, too.
07 May 2012, 08:25 AM ET
Men are more likely than women to be attracted to their opposite-sex friends.
27 April 2012, 06:53 PM ET
20 April 2012, 12:54 PM ET
Men's attraction to red doesn't seem linked to their preferences for female anatomy.
09 April 2012, 04:46 PM ET
Evidence is mounting that the vaginal orgasm differs from clitoral orgasms.
22 March 2012, 04:48 PM ET
Fertile fantasies are slightly more likely to feature men.
19 March 2012, 11:35 AM ET
New research explores exercise-induced orgasms, and they are very real.
09 March 2012, 04:56 PM ET
Teens who don't get formal sex education have sex earlier.
01 March 2012, 03:45 PM ET
How much do you really know about sexually transmitted diseases?
28 February 2012, 02:56 PM ET
Condom use decreases by about 10 percent over freshman year.
14 February 2012, 04:51 PM ET
Some people with severe allergies can experience an allergic reaction after kissing.
13 February 2012, 06:41 PM ET
People who pass on Chlamydia are viewed as worse than people who pass on fatal H1N1.
02 February 2012, 05:13 PM ET
Men are hard-wired to remember unpleasant emotional experiences — the opposite of women.
20 January 2012, 04:16 PM ET
Sexually aggressive men act out differently depending on personality and attitudes.