If you think you're the only one to have certain fantasies, think again. Pretty much everything you can imagine is someone's fantasy, and there are a lot of fantasies that are more common than you think. They mean something different to everyone, but the fact that they're so common can tell you a lot about people.
According to a 2014 University of Montreal study, the most common sexual fantasies are sex in unusual or romantic places, sex with someone other than your partner, and being dominated. Then came public sex, spanking, threesomes, exhibitionism, and swinging.
If you're not sure what your fantasies are, try thinking about your best sexual experiences, your thoughts during masturbation, or movie or book sex scenes you liked. Don't judge your fantasies. As long as something stays in your head, it's not morally right or wrong to think about it. And just because you fantasize about something doesn't mean you want to do it. You can fantasize about someone of the same sex, for example, and still be straight.
Here are some surprisingly common fantasies and what they might mean: