Well, just state the fact like “I approve of this butthole”, or “the artist did a great job at detailing this pubic hair patch”.

But yeah, I totally get it, it is tough.

Yeah, baby, I want to fill you up with eels

works every time

just being nice is good. keeping the focus on the picture or title and not on yourself as the person commenting is also good. "you have great tits, they look gorgeous!" vs "your tits make my cock so hard and ready to cum on them".

if there's a sexy title that invites sexy responses (like a question or whatever) I don't think there's anything wrong with answering it. just don't go overboard and turn it into a paragraph of sext.

being rude or implying the poster isn't good enough for you is always cringe, unless you're on a kink subreddit dedicated to that kind of thing.

I always enjoy a good pun but any genuine response is good. If i comment on posts i tend to go with my initial reaction.

The best way is to do so objectively:

I really like the lighting in this scene!

What great shot composition!

I can see you worked hard on this! Good job!

talk like a normal person and not like a porno

"Well done m'lady. I tip my fedora to thee!"

My brain always wants to comment on something in the image completely unrelated to the purpose of the content for some reason and I never do because I feel like it might be a little rude? Don’t get me wrong I fully enjoy the main content of the image but sometimes people just have such interesting things in the background or on their person. Sometimes Im just tired of being horny and want to make a pun.

If the creator says something provocative, I don't see a big problem in responding with something in horny mode. (But it's probably good to use private browsing and VPN to feel more anonymous).

Otherwise I just be normal and kind, I guess.

That is a wonderful question and I can tell you with certainty that I have no Idea either!

"10/10 butthole" where "butthole" is whatever is noteworthy about the post

I don’t know that there’s anything appropriate, I just go with cringe or try to make a stupid joke. Does anybody actually read porn comments? I’m not sure what else you can say? Serious critique of the lighting? Intellectual deconstruction of the porn’s intent? Cum-taste enhancement recipes? Comment on some feature in their bedroom/house/wherever?

We’re looking at pics of their nude bodies because it makes our genitals feel funny, the whole situation is just so absurdly ridiculous that nothing you say will be or not be appropriate. Though I guess complaining, insults, or implied violence is a general no-no.

Talk like a friend, say what you like or don't like, what you'd like to see- etc.

I go with “nice” or a thumbs up. I don’t think it’s possible to comment on a porn post without being cringe. Sometimes you just gotta embrace the cringe.

When I feel the need to reply, I simply just say "Thanks for sharing."

Just embrace the cringe.

I just match the level of cringe that's already in the comments. If the comments are full of stuff like "nice ass" or "beautiful" it's one thing but if every other comment is in the vein of "I want to tie you up and fill your ass with orange juice while I cum in your hair" then anything is fair game

Why would you not want to be cringe?

Stop commenting and just whack and move on. Unless the poster specifically wants comments, in which case the usually give you a prompt.

Not over the top, somewhat genuine seems to work for me but I get ya

Name?