Meth sounds really bad. This kind of stuff is the reason I will never even bother trying recreational drugs -- they're SO not worth it IMO!

About the other stuff though... Is it really such a big deal if a guy looks at porn and masturbates, even in a relationship? I guess I wouldn't know because I've never been in one... but it seems to me that when partners' sex drives differ, masturbation is a perfectly normal and healthy way for him to get some release. You said yourself that he constantly wants to have sex so he probably has a very strong drive. Getting mad at him for that seems really selfish and ridiculous to me...

Calling an escort service is on another level entirely though. Cheating bothers me so much, and yet it seems so common. How is it that really nice, good women can stay with these dumbass guys who cheat on them, while truly nice, sensitive guys like me who would NEVER cheat can't even get a second glance? Sigh. Society makes no sense to me yet again.

Thinking about it more I actually want to change my answer to the first option: "Yes, no excuse!!"