Is it normal that my bf does this?

Recently I've found out that my boyfriend calls up these free sex chatrooms BUT they aren't the ones that you have to pay for…they are basically like other people around the world who are bored & horny too…well anyway… I finally got it out of him that he doesn't only call to chat with women but ALSO TS & guys! Omg when I heard that I wanted to cry or explode..whichever would be quickest. I know everyone has their own preferences & hey that's fine..to each their own BUT my BF that I've known for what seems like forever being into that, felt almost unreal. He made stupid excuses of why he was into it…excuses that didn't makes sense & honestly went in one ear & out the other. The point of this post is to understand it from another guys point of view or even another females… I haven't told any of my friends only because I wouldn't even know where to start. I was reading a few articles about this kind of situation & most articles said that it is normal for men to be curious & fantasize about ts or other men & most men don't ever go through with the actual thing but are into masterbating to it. I guess them knowing it's taboo is kind of a turn on…BUT my whole thing is that, if he is masterbating to a guy than in some way, he is turned on by them..he was telling me that guys don't turn him on & he doesn't look at men in that way…but when I asked him why he did it, his response was because he WAS BORED! LOL like get real! When I'm bored I look up stupid videos on youtube or hangout with friends.. Just everything about him telling me this felt like he was just in denial. I always try to let him know that I'd be there for him through whatever he decides & let him know that it's okay if you are curious..it's only natural..right? He said he's 95% sure he'd never do anything with a guy BUT even that 5% has me on edge. Gay or not, I'd love him BUT I don't want to be investing my time & effort on someone who isn't even sure of their own sexuality. FML. Oh & he said that most of this is my fault because I started touching his butthole && getting kinky.. BUT exploring that with a female & doing it up the butt with a guy is two different things. Why do people always try to put the blame on someone else lol… Is it my fault though for even going in that direction? I did it because I knew that it was suppose to feel good for a guy…not because it would possibly bring out another side of him. OH && P.S(Should I feel happy that he actually admitted this to me? because on some other blogs & posts I was reading, when these women were saying how they have found stuff on their bfs computer & when they go to talk to them about it, they are always denying it & making it seem like they are the crazy ones. So maybe it's like a + that he is being truthful with me & maybe it is only what it seems like…fantasy)
Please give me feedback! (: Normal or not?