The flashback.
At several points in the film, you have a flashback to where both Joe Buck and his girlfriend (?) are apparently attacked and sexually assaulted (or the r word indeed) but was that really something that happened to both of them at some point in his life or was it somehow in his imagination or fears due to some condition of his, sort of how for example in the film "Tracks" (1976) Dennis Hopper's character imagined that rape taking place on a train but it never actually happened? Or was it all for real? Including the abuse he suffered at the hands of his grandmother etc?
And if it was real or however it was, was it therefore done to establish Joe Buck's character as a troubled and miserable soul and that this is partially why he decided to choose the career of male prostitution in order to survive and make a living?