No it most certainly is not normal. That doesn't mean it's something to be ashamed of, but normal it is not. I think people are genuinely concerned there may be some health issues associated, because most people are physically incapable of such a feat. Again, not trying to shame anyone by saying jacking off 10 times a day isn't normal, but it's not, and it could hurt you, so be careful. It wouldn't be a bad idea to seek some actual professional help, I don't know if it could be a medical issue or psychological issue, but I'm looking up information about frequent masturbation and every article I'm reading says something like "some men masturbate every day, some hardly ever" and that's the normal frequency range they're presenting. Double digits every day is compulsive behavior, and it could be a problem for physical and mental health.