Sorry no one has replied so I thought I'd give it a shot.
I'm female, late 40's. in the past 5 yrs my sex drive has also gone thru the roof.
I do masturbate & would do it more often if I had more private time. I'd say maybe 3 times a week. And yes I also enjoy watching porn. More now than ever before.
I wouldn't say you're sex maniac except if you're having risky sexual encounters or if masturbating is inhibiting your lifestyle. Otherwise I'd just enjoy the energy release & use it as a positive in your life.