Mankind has many legends, werewolves and vampires, ghosts and goblins. But one of the less-discussed myths to show up through human history is what's known as the werestripper.
Tales vary, and there's obviously no verified firsthand accounts. Some stories the vector differs, some stories the specifics of the change can be wildly different from other tellings. Hell, the 'stripper' part isn't necessarily indicative: there's been tales of businessmen turned into porn stars and good schoolgirls becoming werecamgirls. The constant is this: some poor unfortunate (usually male, but rarely a woman) is cursed to transform, at specific times, into a wildly sexualised female body. In addition to these physical changes, the now-busty babe is compelled on a visceral and consuming level, to act like a slut. Most commonly, they end up living a Jekyll and Hyde life, the male body living a mostly-normal life except when transforming into a busty babe who promptly and obediently goes off to turn in a shift at the local strip club.