In both kinds of threesums, the person is only considered to be bisexual, or participating in bisexual activities if they're playing with the partner of the same sex. Two guys teaming up on one chick isn't gay or bisexual at all.
As for Sania's question, It's because I"m not attracted to any other guy. If I'm not attracted to someone else, I don't want them anywhere near me sexually. As far as I'm concerned, my partner is the hottest thing walking this earth. Kinda hard for other guys to compete with that
