I do it at least thrice a week now. The reason being I've got a
constant supply of women wanting to have sex with me. Not bad for a
fifty-eight year old man eh? 
Anyway, masturbating is perfectly healthy. There isn't anything
wrong with it, it's like a natural reaction. In fact, a survey from
a certain magazine shows that over ninety percent of men claims to
masturbate and sixty percent of women do so too! 