Final answer:
Masochism is the term used to describe the sexual pleasure derived from self-inflicted pain, which is relevant to the case of Albert Fish inserting needles into his groin.
Step-by-step explanation:
The sexual pleasure from the infliction of pain on one's own genitals is referred to as masochism. This term comes from Leopold von Sacher-Masoch, whose work depicted the enjoyment of self-inflicted pain. Masochism can sometimes involve autoerotic practices, which might include the insertion of objects such as needles as mentioned in the case of Albert Fish.The sexual pleasure from the infliction of pain on one's own genitals is called autoeroticism. This refers to the practice of achieving sexual arousal and gratification through self-inflicted pain or humiliation. In the case of Albert Fish, his insertion of numerous needles into his groin was a manifestation of this practice.