Well I'm not quite sure how you got attacked where you say you did, but I've met a feral kitten before and you don't ever wanna f*** with them.

so they were wild kittens?

Technically, that's a violation of doctor/patient confidentiality act, or more commonly known as the HIPAA Privacy Rule. They could get in a LOT of trouble for something like that happening! OP, you should read more into it and decide what to do from there.

It took me three read throughs to realize you said butt cheek, not butt crack. I had a terrible vision in my head of kittens mauling a butt crack so badly, they have to sew it up.

No shame in this. Kittens can be quite devilish little creatures.

another piece of information to use in my argument that all cats are assholes.

Kittens aren't wild animals unless they were a non-domesticated breed. Odds are you either attacked by very playful kittens (this is when their claws are sharpest) or by stray, feral (but still a domestic breed) kittens. For the record, grab them by the scruff to get them off.

Kittens are vicious little creatures, but they are so damn adorable.

That had to have been the most adorable way to get injured. Be proud, OP! Annoyingly, they were probably showing affection.

My grandmother has feral kittens on her ranch, I was helping tighten the line when I reached into the tool bag and yanked out my hand with a little cream tabby attached. The asshole bit clean through my fingers down to the bone; those ******* are vicious.