Is not feeling some pain normal?

I know I have a high tolerance for pain but I literally can't feel it at times, well more of I don't feel it that often. One example is my bf will bit pretty hard to the point I have scabs the next day on my boobs and I don't even tell he drew blood till I see the scabs. I don't feel it as pain. I can feel pain but it has to be a lot for me to feel it like very extreme pain. Idk if this is just a high tolerance for it or what exactly I find it strange. And I can feel pain when we have sex if he goes too deep when my cervix is low but other then that nothing. I've had a few surgeries in the past, I had brain surgery in the frontal right lobe, I had my gallbladder out which didn't hurt I just felt sore then I had a knee scope last year. The knee scope didn't hurt that bad but it was more annoying then anything bc I was off one leg for 6 or 8 weeks something like that. Physical therapy sucked anyway I was just curious if that's normal to not really feel pain.

Edit: I forgot to mention I do have nerve damage from brain surgery bc I still have like ghost pains from it and that surgery was 4 years ago. Doctors have told me I do have nerve damage and I have some memory problems too