A kinky birthday party for adult-baby fetishers. Hilarious stuff. Diaper fetishism is a paraphilia in which a person feels a strong desire to wear or use diapers, usually without physiological necessity. It is differentiated from infantilism in that those of the latter category are also focused with returning to babyhood in ways other than by wearing diapers. The popular term for diaper fetishists is diaper lover. Diaper fetishism is a type of sexual fetishism, which is one of many paraphilias.