Sexual fantasies are images you see in your mind’s eye that are sexually exciting to you.
It can be pictures, like the ones you see in porn magazines or more romantic ones. It can also be mental pictures of past sexual experiences.
A sexual fantasy is often like movie: a story that unfolds. If your fantasy is like a movie you will get more excited the more you enter into the sexual feelings of the ‘actors’. If you try to imagine their excitement you’ll get excited yourself.
Sexual fantasies are a normal part of sexuality. Research in the Netherlands among 12 to 18 years old showed that 93% of the guys and 88% of the girls fantasize about sex.
People start to fantasize about sex early in life. From the 11-13 years old 88% of the boys and 77% of the girls fantasize.

What’s the content of sexual fantasies?
Why do we fantasize about sex?
Masturbation & fantasy
Strange fantasies

When I have sex with my girlfriend I fantasize about others. What can I do to stop this?