I'm M (25), married, does all kinds of crazy things on bed with my wife. I do watch MMF bisexual porn sometimes because, i dunno I find it exiting. But i never considered myself Bi or wanted to try MM or MMF.
Recently my wife bought one of those egg vibrators (2 actually, one long one short). And while she was dominating me on bed, she pushed one of those vibrators up my ass and started blowing me. I enjoyed it a little bit, but was super confused felt a bit uncomfortable. She does put a finger up my ass sometimes but this was different and big!