Me, my partner - and another male? He keeps asking me for a threesome but seems to be indifferent as to if it is with a girl or guy.

He's not gay, he's a guy. Men are visual and it is a turn on to have our girls be sexually adventurous. Think about it, the guys don't need to be anywhere near each other. His fantasy is all about you, watching you as a live porn star. If it interests you, then try it. Otherwise, let him have the fantasy without accusing him of being gay, he's not thinking about the other guy, he's thinking about you. If you are going to do it, try working on controlling his jealousy. Have him jack off while you tell him about past sexual experiences with other men. If he can handle that, he can probably handle the threesome.

Or he's into cuckolding.

He may be secretly bi, but certainly not secretly gay; if he was, you wouldn't be in the room.

Most gay guys, when they have threesomes, have MMM threesomes.

Me and my ex did that twice (we were together for 2 years before we did though..).. I have to say it was fun. I don't know why but I get turned on by watching my partner being pleased by some guy I don't even know..Its fun pleasing the girl with 2 sets of equipment too.

I know I'm not alone on this either so just ask your guy WHY he wants this..

Make your choice based on this information:

The deal is that your partner is almost certainly trying to sabotage the relationship. He's not interested in a serious, mature, healthy emotional commitment.

My boyfriend did the same thing until we finally had the threesome and he did not look at the guy I guess he just wanted it for me and it was really breathe taking.. Amazing... you should try it