My husband refuses to drink any water. He only drinks monster energy drinks and (rarely) orange juice. He's been doing this for 10+ years. He gets frequent headaches and stomach problems, but refuses to believe it's from this bc he's been doing it for so long. Is this normal for men, please explain?

Is it common for men not to drink any water? Is there some kind of aversion to it I'm not aware about? Overall he's really healthy it's just this water thing.

EDIT

I should have clarified in my original post- I meant healthy as in he has a very healthy fresh diet food-wise, and he exercises frequently, normal bmi/no weight issues. No skin issues, no health complications-yet.