Diaper fetishism, nappy fetishism or diaperism, is a sexual fetish in which a person feels a desire to wear or use diapers. This is not due to a medical need.
Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. Being forced to wear diapers as a form of humiliation is sometimes a behavior encountered in sexual masochism.
As of 2013, little analysis of this paraphilia has been reported in medical literature.