The conspicuous use of quotations in the title of Xtuber ManyWay's hardcore clip, ‘Fucking A "Bi" Guy,' suggests he's not convinced this bottom swings both ways. And from the way this guy attacks that dick, we're not sure we disagree.
This is not to suggest that we're interested in getting into any long-winded debates over the existence of bisexuality amongst twinky bottoms. However, we will say that anybody who takes a cock up the butt like this champ probably doesn't get much time practicing anything else.