In the LGBT precinct of Facebook recently, this Jim Benton cartoon (eventually this posting will be about Benton, but first the folktale scenarios):
The basic scenario is Beauty and the Beast: a beautiful maiden (that is, a virgin), often a princess; and a monster, a grotesque creature, either literally an animal (a gigantic ape, a dinosaur, a mutant lizard, a dragon, whatever — but male) or a man animalistic in form, sometimes in nature as well. The monster desires the maiden: to devour her (literally), to despoil her (sexually), or merely to love her (romantically).
A third character, the Knight, figures in an extended scenario: a hero, a handsome and virile young man, often in armor, often a prince, whose role is to challenge the monster in battle and overcome him, thereby rescuing the maiden — for himself; she is his prize. In the extended scenario, two males are rivals for the maiden.
In Benton’s version, the hero challenges the monster, demanding that the monster deal with him rather than the maiden. And so the monster does. Sometimes in a love triangle, the rivals become lovers. (Combat between men is sometimes a route to mutual respect, male bonding, and friendship; in this case, the relationship goes one step further.)