If you think about any sex from the "right" perspective, it is all gross. I mean really...you're putting your most prized body part where someone else expels waste from their body? And what about oral sex? WhyTF would you ever want to do that? I love it, but if I over think it?...yeah
It's all about perspective, mang.
I don't see why any of that is 'wrong' or 'gross'. It's only our puritanical roots, where somebody at some point decided that anything pleasurable was evil, that has ruined it for us. It's taken hundreds of years to get to the point where people can enjoy their natural bodies the way they want to, without feeling bad about it.
And that last bit is the most important - people have had anal sex (both gay and straight couples), oral sex, and all kinds of stuff for hundreds of years, while feeling guilty and thinking they were doing something wrong. Thankfully, the world's coming to its senses these days, and personal freedoms have become more important than our nonsensical 'traditions'.
So yeah.