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Ageplay or age play is a form of roleplaying in which an individual acts or treats another as if they were a different age. Ageplay is role playing between adults, and involves consent from all parties. Portraying any age can be the goal of ageplay, from babies, to the elderly. Usually this involves someone pretending to be younger than they actually are, but more rarely can involve assuming an older role.
Sexual ageplay 
Ageplay can be sexual or non-sexual. It may be mildly sexual, or very sexual.
Ageplay can enhance power dynamics, and allow a partner to feel more comfortable with their dominance or submission. Oftentimes, sissification of boys is present, in order to add another level of power to the situation.
Sexual variations may include among other things such as incest play, in which individuals recreate and sexualize roles within a family, and Daddy's girl fetishism in which real or imagined age differences are the basis of the roleplaying and the female is portrayed as the younger partner.
Ageplay is not considered pedophilia or related to pedophilia by professional psychologists. Individuals who ageplay are not attracted to children, but instead enjoy portraying children, or enjoy childlike elements typical of children present in adults.
Sexual ageplay itself does not involve the sexual attraction to biologically underage people. Rather, when a consenting adult takes on the roleplaying mindset of a young person, it is motivated by re-experiencing emotional states and social interactions of one's youth, which also happen to be pleasurable in a sexual context to the participants.
See also 
- Aggrawal, Anil (2009). Forensic and Medico-legal Aspects. Boca Raton: CRC Press. ISBN 1-4200-4308-0.
- Rulof, Paul (2011). Ageplay: From Diapers to Diplomas. Las Vegas: Nazca Plains. ISBN 1610981901.
- Sybil Holiday; Henkin, Bill; Henkin, William A. (1996). Consensual Sadomasochism : How to Talk About It and How to Do It Safely. Daedalus Publishing Company. pp. 60. ISBN 1-881943-12-7.
- Weiss, MD (2006). "Working at play: BDSM sexuality in the San Francisco Bay area". Anthropologica 48 (2): 229–246. doi:10.2307/25605313. JSTOR 25605313.
- Aggrawal, 2008, p. 121.
- Aggrawal, 2008, 147.
- Media related to Ageplay at Wikimedia Commons