A molly is a name for a homosexual male, who disguises himself as a woman so he can have sex with other gay males, without anyone knowing, these were very prevalent in 18th-century England, where "Molly Houses" were established, some of them were even in America, which inclined everyone's favorite founding father,
Alexander Hamilton, a place to go when he was bored*.
*Many historians perceive
Alexander Hamilton to be bisexual, through his
relationship and letters with Lt. Col. John Laurens, and some speculate he visited said Molly Houses.