Help! My guy is into pain

I'm a really kind person and hurting people is the last thing on my mind...

Unfourtunately the guy I am seeing at the moment fold me he has a kink for pain inflicted on him.

He said one of the things he wants me to try is to make his back bleed with my nails (I have long natural nails) while having sex.

I feel like he feels a bit awkward discussing his kink so I just wanted to see if any other girls out there have any suggestions on some other things I could try surprise him with

Or just ways for me to be able to hurt him without freaking out

Thankyou