My fiancé’s gay?

So me and my fiancé have been together for 6 years, and are high school sweet hearts (we’re both 21) he’s never show any suspicious behavior. We have sex almost every day and he usually initiates it, and from what I’ve been able to tell we’ve always been really happy together. Within the past few years we started experimenting, he really likes when i rim him and I also use dildos on him and we both really like it. We also recently started watching porn together and we usually watch pegging, riming videos etc. well tonight he put on gay porn and admitted to sometimes watching it. I love that he’s comfortable with trying things with me and I’m okay with a lot of things but I feel a little weird about the gay porn. I asked him if he would ever try anything like that he said “I mean I definitely would never try anything like that with another person” and I want to believe him I’m just unsure. I’m just scared that he may be curious especially considering we’re getting married on July 15th. help!

Edit***

I also want to say that I don’t think there’s anything wrong with someone being bi or bicurious, but i will admit it does make me nervous to think about because I love him so much and I wouldn’t want to hold him back from experiencing those things but I also wouldn’t want to end things☹️. I also don’t think being into butt play is gay I mean I stated above that we both really enjoy it. The part I was concerned about was that he gets turned on watching 2 men have sex. I’m not homophobic/biphobic and I love and accept my fiancé as he is I just don’t want to get married if he feels as though he wants to explore his sexuality, and wanted to know if anyone had similar experiences. Thanks for the feedback.