While not common, infections and even major loss of penis tissue occurs, which has resulted in attempted male to female sex surgery.
Any kid who has the end of his penis whacked off should get to sue the doctor and any medical facility; and the maker of any device used, or A LOT of money.
"(ironically because it was promoted originally as preventing) masturbation."
I always avoided masturbation because I was afraid of hairy palms.
What planet do you come from? Sorry, buddy, but you've lost all respect in my book.