Charley Parkhurst's Whip

Origin
Charley Darkey Parkhurst, born Charlotte Darkey Parkhurst (1812–1879), also known as One Eyed Charley or Six-Horse Charley, was an American stagecoach driver, farmer and rancher in California. Born and reared as a girl in New England, mostly in an orphanage, Parkhurst ran away as a youth, taking the name Charley and living as a male. He started work as a stable hand and learned to handle horses, including to drive coaches drawn by multiple horses. He worked in Massachusetts and Rhode Island, traveling to Georgia for associated work.

Effect
When the whip is cracked, the user will look like the opposite gender. A male will look like a woman, and vice versa. When cracked again, the user will change back.