A sexual fantasy is a fantasy of a sexual nature. A person may or may not wish to enact their sexual fantasies in real life; some may find their fantasies completely unacceptable were they to be transposed into real life.

Sexual fantasies may involve any human sexual practice or paraphilia. Common sexual fantasies include:

Unusual, but well-reported fantasies include:
  • being cuckolded
  • various other paraphiliac activities

Sexual fantasies that used to be common, but are not now: this is a stub article