Is there some like unspoken rule that some dudes don't wash their ass

This is embarrassing but I didn't wipe until I was in my twenties and saw a reddit post of girlfriends complaining about how none of their boyfriends wiped and how they all had underwear streaks and other hygiene issues. I've kept my butthole clean for over ten years now but I have no doubt that that's still a thing, and that there's some kind of machismo "being clean is for betas and females" thing that causes it.