All right. [it seems like a good enough idea, so he holds out the trio and lets them pick their poison for the first round. Maybe they'll get lucky.]

You won't die. It doesn't hurt, either, it might simply feel weird. If they don't match, you'll know, and it'll be easy to pull it right back out.

[he doesn't even need his Room for this, it's just a matter of sticking the right heart in the right hole. The three hearts are beating out of sync, too, so it might feel odd to have a beat that doesn't match your own in that spot for a few moments, but eh. He's done worse.]