infantilism
Paraphiliac Infantilism , or Infantilism, is the fetish involving roleplaying as an infant or child. The person in question is an adult and is often dressed up as an infant or child, they might be playing with a child's toy or using infantile objects like diapers or pacifiers, and they might be performing this for sexual reasons or because of another fetish; it is not uncommon for Bondage, Hypnosis, or Humiliation…
