From tying up your partner a la "Fifty Shades of Grey" to spying on your significant other while they seduce a stranger, the sky's the limit on what you may secretly (or not so secretly) fantasize about. According to a study done by sex toy brand EdenFantasys, one in four Americans has a secret sex scenario that they want to act out but have yet to share with a partner.
So what's the appeal of a fantasy? Sexual health coach Dr. Jayne Guyn, Ph.D., RD, and author of "Too Busy to Get Busy," says, "Our erotic urges enjoy playing to a script. It's not necessary to have one to run eroticism, but when a turn-on meets a hot story — particularly a forbidden story — it has a place to land." Read on to learn why some of the following popular fantasies may fire up your libido.