How do you react when people tell you that you're an asshole

I tell them to get their face away from it to get a different perspective.

I just say "ok"
I already know I am

I ask them why

No. You’re a cute bunny

I've only been called an asshole once and my reaction on the inside was "really? Cool lol"

Most insulting things said to me were said by my father, but "asshole" was one name he never called me. Didn't really reacted to any of it as it was par for the course with that asshole.