I'm not comfortable with the thought of a man sexually pleasing another man. Especially by anal penetration. I just don't get it.
There are three thoughts here, all intermingled and mashed together rather confusingly.
The first is empathy - you "don't get it". That's fine. There are plenty of activities human being engage in that I "don't get" - horseriding, stamp collecting, enjoying Dan Brown novels - but I wouldn't say those things make me "feel uncomfortable", nor would I ever complain that equestrians or philatelists were "thrusting it" in my face. So there's something else going on here.
The second is disgust. "Especially by anal penetration". On that note, I suggest, and I'm serious, you buy yourself an anal toy and experiment with your own body to understand the drives and desires of others. The male g-spot,the prostate gland, is just inside the anus, and if you understood yourself just how pleasurable anal stimulation was, you'd come some way to losing your rather scornful attitude. Use lube, go slowly. It will be worth it.
The third is the most pernicious. In the first part of your reply, before we even get to anal sex, is "I'm not comfortable with the thought of a man sexually pleasing another man". This is blind prejudice, socially constructed with no legitimacy whatsoever. Why should you even care what other people get up, or how they sexually please each other? Why do you even think about it? And in what way, pray tell, can two people pleasing each other behind closed doors "make you feel uncomfortable"? How are they affecting your life or your delicate sensibilities just by doing exactly what you do, but in a different gender combination? I'm really struggling to understand your objection, or your choice of words.
"I don't understand". Fine. "It's not something I'm into personally". Fine. But when you start talking about feeling "comfortable", and making statements about homosexuality being "thrust in your face" which make it seem as if you're chastising others simply because of your own limp, vapid emotional failings, you really cross the line from tolerant into intolerant, from pluralist into normalist and from straight guy into bigot. You mention some "women being uncomfortable with idea of anal sex" - but this is, presumably, an unwillingness on their part to actually do it themselves, and not a directed, displaced and ultimately politicised disgust at someone
else doing it, which is an attitude belied in your statements.
If the thought of gay sex makes you fee uncomfortable, that's
your problem, and one you need to deal with. You have no right to complain about deviance or "thrusting" simply because you have been inculcated by a society that has moralistically demonised an entire section of society.