Vance is right--masturbation has nothing
to do with wrinkle formation.
How much time have you spent in the sun over
your lifetime? Too much sun is a far more likely cause of wrinkles and premature aging. Stress might be a factor too.
As far as reversing it, you probably can't do much without some really expensive dermatological treatments, but you could try the anti-aging wrinkle reducing creams in the skin care aisle.