Blood/Knife play TRIGGER WARNING: SELF HARM?

Alright, so I've got this fuck buddy and he's a pretty kinky dude. We've been seeing each other since May and we've talked about quite a lot of things. I used to self harm pretty severely in my youth but as I've gotten older it's turned into more of a sexual thing. I don't NEED it, but damn do I want it. We've talked about it in depth and he's into it, he's never done it himself but he really wants to try it. I'm moving out of state soon and I want to give him that experience but every time were together we get too carried away and get distracted before we can ever even bring it up. Not to mention I never have the courage to bring it up myself. I just don't know how to balls up and remind him before we get carried away but we're running out of time. Advice? Thoughts? Anything? EDIT: We've discussed it very in depth as well as safety and such. He knows where it's safe to cut and where he's comfortable. I'm not new to this in the slightest. My self harm was... different. It's difficult to explain in depth, but that's how I learned that I had an interest in it as a sexual thing. Long story, lots of details and this isn't the place for it. And sorry for editing rather than just responding to your comments, but I have family on this app and they would try to have me committed 😅😅😅