Riding on the roof
A gay person getting oral sex uses the roof of the other guy's mouth for extra stimulation.
Mike: Man, you were fast last night during oral sex.
Steve: I know, riding on the roof is so stimulating I can't control it.
Mike: I like it that way too.
Steve: I know, riding on the roof is so stimulating I can't control it.
Mike: I like it that way too.