So recently my boyfriend decided he wanted to try his hand at fisting (no pun intended), he's pretty new to the idea, but I'm willing to try most things if they're safe. I've had a kid before so I already know I'm capable of stretching enough for it, although he can't get his hand all the way in, (we stop if it starts hurting instead of feeling good), when he pulls his hand out his fingers are always coated with a discharge that looks like blood. I feel no pain from this and I don't bleed myself because of it. I'm not on my period. It's just.. on his fingers.Is this normal? Should I seek medical advice about this? I dont' really want to stop him because it does feel good, and he doesn't try new things that often.Any advice?