The World According to Garp (1982)

T.S. Garp is the out-of-wedlock son of a feminist mother, Jenny Fields, who wanted a child but not a husband. A nurse during World War II, she encounters a dying ball turret gunner known only as Technical Sergeant Garp (“Garp” being all he is able to utter) who was severely brain damaged in combat, whose morbid priapism allows her to rape him and to be impregnated. She names the resultant child after Garp.

Garp grows up and becomes interested in wrestling and fiction writing, topics his mother has little interest in. Garp’s writing piques the interest of Helen Holm, the daughter of the school’s wrestling coach. She is wary of him. His mother observes his interest in sex and is intellectually curious about it, having little more than clinical interest herself. She interviews a prostitute and offers to hire her for Garp. Immediately after, Jenny decides to write a book on her observations of lust and human sexuality.