Bisexual on LetMeJizz
Most people assume the label just means two women sharing one guy, when the genuine article turns on men who get hands and mouths on each other as readily as on the woman between them. That blur of who wants whom, rather than a tidy one-way threesome, is where the real charge lives.
497 bisexual videos here, all HD and all free. New ones go up daily, so check back if you don't find your scene first time around.