This article reviews the research literature on sexual fantasy, a cent
ral aspect of human sexual behavior. Topics include (a) gender similar
ities and differences in the incidence, frequency, and content of sexu
al fantasies and how they relate to sociocultural and sociobiological
theories of sexual behavior; (b) the association between frequency or
content of sexual fantasies and variables such as age, sexual adjustme
nt and satisfaction, guilt, sexual orientation, personality, and sexua
l experience; and (c) ''deviant'' sexual fantasies (i.e., what they ar
e, whether they play a role in the commission of sexual crimes, and wh
ether they can be modified). The article ends with a summary of major
findings and suggestions for future research.