Casual sex had never interested me before; I had always been a bit of a prude.
“Bay isn't a prude, but she isn't going to have sex with anyone just to get it over with,” Weiss said.
We are left with stalwart genres (action, rom com) and classic roles (prude, seductress, jock, backstory-less best friend).
1704, "woman who affects or upholds modesty in a degree considered excessive," from French prude "excessively prim or demure woman," first recorded in Molière. Perhaps a false back-formation or an ellipsis of preudefemme "a discreet, modest woman," from Old French prodefame "noblewoman, gentlewoman; wife, consort," fem. equivalent of prudhomme "a brave man" (see proud); or perhaps a direct noun use of the French adjective prude "prudish," from Old French prude, prode, preude "good, virtuous, modest," a feminine form of the adjective preux. Also occasionally as an adjective in English 18c.