Hi sir my age is 17 I have been mastrubating since 3years but I have my foreskin tight later only I saw videos in youtube to become my foreskin enlarge and before some 5months I had a small cut in me frunulum but it was not bleeding and for a month I was not mastrubating.but today I was seeing porn video and mastrubating suddenly I got a cut and it was bleeding.after some hours I opened slowly and got a bigger cut and was bleeding horribly I want a proper concern sir.please help me.