Thats just wrong
dont you think of how others would feel if they knew that they were harming themselves and could do nothing about it
No, we should be free to do as we wish with our bodies as long as it harms no one else, be it self harm, or even suicide.
No, Because people sometimes harm themselves because by doing so, they are able to gain a subjective sense of control over chaotic internal emotions and thoughts. Seizing this control involves shifting the focus of their attention away from something more troubling towards something less troubling, therefore you cannot put a punitive judgment on a psychological issue.
I'd rather they harm themselves than harm another person.