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 roleplaying between adults, and involves consent from all parties. Ageplay can be sexual or non-sexual, it all depends on what people agree to within their relationship. 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.^[1]

Ageplay can be sexual. It may be mildly sexual, or very sexual. Within dominant/submissive relationships, ageplay can enhance power dynamics, and allow a partner to feel more comfortable with their dominance or submission.

Sexual variations may include among other things such as incest play, in which individuals recreate and sexualize roles within a family,^[2] 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.^[3]

Ageplay is not considered pedophilia or related to it by professional psychologists.^[4] Individuals who engage in ageplay enjoy portraying children, or enjoy childlike elements typical of children present in adults (and to a lesser extent, adolescents).

In a BDSM (Bondage, Dominance, Submission, Masochism)-type ageplay relationship, there might be roleplay that includes spankings or some sort of punishment that consenting parties agree to. This type of relationship may intersect with elements of petplay, in which one party is a "pet" to a human caregiver, although there often are differences between the items and scenarios used in each.^[5]