My fiancé (male, 30yrs, together five years) uses online porn for arousal. I recently found he is doing this daily and although most (about half) is female oriented (male with female; mature, chubby, etc), the other half has a lot of trans porn and bisexual sites (MMF threesomes with heavy men on men with female). He said the more kinky stuff is just because it is "different" and for me not to read too much into it. He said he doesn't have any interest in exploring/experiencing bisexuality.
Normal and common for straight men? I don't get how a straight man could get turned by male on male (oral/anal/kissing) without being bisexual?

Maybe he just has a strange interest in it, maybe he has bisexual tendencies, it's hard to know, but if he says he does not, that's all I can go on.. If he is using this porn to satisfy those, does it bother you? You should have a long talk with him about it, whether it bothers you or not. Explain to him how you feel and discuss ways that you can both be happy and fulfilled. Good luck, that's a hard one!

He's openly talking to you about it. That is very positive. Guys can look at all kinds of things that make women wonder what's going on in their heads. I wouldn't marry him until you are completely familiar with his porn activities. If you know all about it, and can talk to him about it. It may be no trouble at all.

Read up on it though. Find out what porn addiction is. I'm not saying that this is a problem for him. But, can you live with this concept if his porn watching increases? What does porn mean to you? Will he share his activities with you?

You're not even married and you're living with a porn addict?

***Don't give up on happiness so easily***

Time to break up and go in for therapy before you get any older.