Buy the book titled “The Multi Orgasmic Man” It will solve all of your problems not to mention giving you a few tricks at giving your woman orgasm. I`m 20 and after reading this book I have the sexual experience of a 40 year old - when i have sex the girl orgasms once before sex and then during sex as depending on how long I feel like making love for. The girls love it - nothing like making them realize just how bad their last boyfriend really was.
If you are a masochist you could masturbate often… Basically rubbing it raw daily. Over time your sensativity would reduced greatly.
However, you will likly end up with some scaring. Yes, I know this from experience. I’m actually wondering if I could have the scars removed through laser surgery.