I think there is a widespread image in the general population that gay=anal sex. It's one of the biggest impediments to getting gay rights passed. Perhaps this comes from the idea that the essence of heterosexual sex is penis into vagina, so by logical extension a gay penis must go into an analogous gay hole.
Certainly this is what was on Senator Strom Thurmond's mind during the Senate hearings on the UCMJ prohibition on homosexuals, way back when Don't Ask, Don't Tell was being formulated. He all but called us fudgepackers. I fantasized about being the one at the mike and saying, "But Senator, one can be homosexual without ever taking it up the ass!" and watching his dentures drop out of his head in bewilderment. I would also have mentioned to the old coot that one can be homosexual without ever having touched another human being, a concept that doubtless would have made his head explode. Finally, I'd hit him with the fact that probably 3 out of 4 actual instances of anal sex in America occur among heterosexual couples. By the way, the UCMJ specifically calls ALL oral and anal sex incompatible with military service, so technically... any one in the service who has ever gotten a blowjob or eaten pussy should be out on the streets. Yup, a gay man who has never touched another male is out, but a straight man who engages in heterosexual sodomy on a regular basis is most welcome.
I tried anal with my first 2 boyfriends and thoroughly disliked it. Vowed to never do it again. Besides, I preferred topping and my current partner did, too. We've been together almost 5 years and haven't fucked, though he is a hopeless ass man and we do a lot of buttplay to keep him happy.
I think that gay porn makes everyone think that anal sex is a given, but at least half the couples I know don't engage in it. There is no limit to the other interesting and fun things to do.