I used to mastrubate when I was 13 years it was less at the beginning but the frequency increased and I became an addict when I'm 16 years and over 4 years period of time I watched porn and had done mastrubation more frequently, for more orgasm I used to rub my nipples and done mastrubation later on I got habituated to nipple rubbing that I can't get erection and orgasm If I won't rub my nipples.I used to mastrubation for long hours without ejaculating all the day,I used to forcely erect and ejaculated. Now I'm 24 I was having less erection and my size got shrink compared to when I was 16 years I can't feel sensation in my pennis I feel numb pennis. I'm not getting erection and my pennis also got numb without any sensation while touch or mastrubation and also I'm not getting sexual feel my libdo was totally gone.l'm so much worried what should I do is there any treatment ?? Pls help