My husband masturbates a lot. It's not like we never have sex. He's always horny, I can't keep up. I come home from work and he's locked up in the bedroom. When I catch him doing it, it makes me uncomfortable and I get upset. He gets mad at me for being upset and says thing like "if you don't want me to do it have sex when I want it." He can be very disrespectful. Sometimes or most of the time I feel like sex is the only thing he values in our relationship or that that's all that makes him happy and secure.
Is it normal? If so, why does it bother me? I am so used to it, I don't know any more.