Hubby and I have been doing MFM threesomes for some time now. I know he would never go off and have sex with another guy by himself and I know he has no interest in anal, even with me. But when I have hubby and a third together, hubby does like giving him a bit of oral. I read a saying once that if the woman puts a cock into her guy's mouth he isn't bi. I have always done that, giving a guy a good blow job and sharing the cock with hubby. But now hubby's favourite position is me sitting reverse cowgirl on a guy so he can watch really close the cock sliding in and out of me. He likes to bury his face into my cock-filled snatch, slide the cock out, give it a suck and slide it back in. I love this, he loves it, but we have had this discussion as to whether this makes him bi. It doesn't matter really, but we wondered where the line is between a sexy threesome and bi. Thoughts?