When clinical psychologist Cindy M. Neston wrote her book, Why Women Have Sex: Understanding Sexual Motivations from Adventure to Revenge, she interviewed thousands of women ages 18-45 with one pressing question in mind:

Why do women have sex?

Not surprisingly, Neston found that women like to have sex with people they’re attracted to, but most women’s answers fell into one category — which you may or may not find surprising.

RELATED: 4 Spicy Sex Tips Dr. Ruth Says Longtime Couples Have to Try

“It’s because sex is fun!” says Neston.

Women see sex as exciting and want to partake because of physical gratification or to achieve orgasm, explains Neston. Surprisingly, trying to conceive or wanting to feel emotionally connected with your partner were not the top reasons.

Ready to have more “fun” yourself? Try one of these spicy sex tips recommended by Dr. Ruth!