Well, i don't think there is a certain age to stop wanking. I know for sure im going to be wanking all my life... Lol
Wank as long as u like if u enjoy it im never gona stop jizzin ;)
There isn't an age in which u should stop using proactive...the product is not meant to be used forever u should only use it when u need it and use a milder cleaners when u can.