BDSM - Diapers are sometimes used during prolonged bondage sessions, not only as a method to control and shame the submissive partner, but also to allow longer periods of bondage. In Total Power Exchange, diapers are sometimes utilized for the dependency they represent of the wearer on their master to be checked and changed.
Adult Babies and Diaper Girls
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.