Is it normal that my boyfriend likes anal sex with men

My boyfriend and I have been dating for about 3 months. We've had crazy hot sex since the night we met. First he tells me he likes 3 somes. I assume he means 2 girls and him. Then he tells me about his ex and him hooking up with guys but that he only watched... I guess he was testing the water for my reaction because later he tells me that he's had 3 somes and likes to have anal sex as a bottom. And has had a few solo encounters with men giving blow jobs and having anal sex. Again as a bottom. And seems to prefer large, black cocks. But says he isn't gay or bi. I'm not sure what to think. At first I was a little shocked. He doesn't seem like the kinda guy that you would imagine liked those kind of things. It's clearly something he wants me to do he has brought it up over and over and keeps wanting to talk about it and tell me about it, the idea has started to turn me on. I agreed to have a three some. We haven't done it yet but I see us definitely doing it and having a very open sexual relationship. The only huge concern I have is, is he gay? Is this just a taboo kind of push it to the edge just to cum thing or is he so afraid to admit he's gay he'd rather mask it with three somes and a relationship with a woman he isn't really attracted to or in love with? I told him I thought he was bi and he almost seemed offended. I'm in love with him. I like a lot of erotic messed up stuff too so I've never judged. I just don't want to try to build a life with someone who's gonna realize they're gay one day and leave me for his lover Raoul or in this case Tyrone. lol. What do you think people? Gay? Straight? Bi? Free love? Sexually disturbed? Should I even attempt a relationship with someone who isn't satisfied with just me whether the threesomes are with guys or girls?