Why tf everyone downvoting this mf? He just showing his appreciation for a good pussy. Nothing wrong with that.
While not specifically mentioned anywhere in the commenting rules, collectively the danbooru community is against worthless comments.
It's generally considered anything pertaining to a commenter expressing their horniness, or feedback to the artist for that matter, doesn't provide any value to the post. So it gets downvoted.
I'm sure I've seen this topic discussed in a thread somewhere but I have no clue where to find that discussion