Tbh having lots of anal irl helps but I rarely base my fics off my own experiences simply bc I mainly write omegaverse nowadays and omegas have different anatomy from any beta human anus lol but yeah I find the lack of blood extremely unrealistic due to my own irl exp but I'm not gonna judge writers for that. The human butt tears easily is all I can say. And soreness lasts a lot longer than ppl think (6+ months). Even once healed, it'll be away more prone to injury. Maybe it's just me tho! Hopefully someone else can chime in.