Science of Sex

Contrary to stereotypes, men say "I love you" first more often than women.

Gay, lesbian and bisexual individuals may not see a mental health boost in coming out if their communities are hostile to homosexuality.

Sexual personality is associated with whether or not a partner will stray.

Thinking of partners as sex objects also decreases male's sexual satisfaction in relationships.

New world monkeys have a different form of oxytocin than other mammals, and it might act differently too.

The latest study shows more teens are virgins these days, and more people - especially women - are bisexual.

When subtlety reminded of love, men become more chivalrous, a new study finds.

Here's the dark side of the "love" hormone.