According to "Hillbilly Elegy," Vance's grandmother assured him that he wasn't gay, but that God would still love him if he was.
Yes, there's more to it than that and it's quite stupid and also quite bigoted. Republicans don't need to know that. They didn't and won't read his book anyway.
When he brought up the issue with his grandmother — known to Vance as "Mamaw" — she replied bluntly: "Don't be a fucking idiot, how would you know that you're gay?"
When Vance explained his reasoning, she laughed.
"JD, do you want to suck dicks?" she said, according to the book.
So... 8 year old JD Vance instead wanted to eat pussy?
Considering not all straight women want to suck dicks, I don't think the desire to suck dick is a good determinant of whether you're gay or not anyway.
Shit, I'm bi, and I don't really like the idea of giving oral to any gender. The thought of body fluids in my mouth kinda grosses me out, unfortunately. Makes me happy that people love it, though. The world would be a better place if everyone got to experience their ass getting eaten voraciously. It really is an amazing experience.
Also, if eight year old Vance brought this up with his public school teacher and they gave him the same kind of response (minus the "suck dicks" and "fucking idiot" parts), conservatives would absolutely lose their shit over "grooming"