There's some truth to "my body my choice", but also there's also a particular limit I want to discuss.
Leaving the obvious controversial happening aside, things like tattoos or other body modifications and surgeries also fall under "my body my choice", but that doesn't mean I like any of them. Yes, it's "your body your choice" because I can't physically stop you from doing dumb shit. Even if I could prevent you from doing shit to yourself, I might simply not want to, because I can have a clear sign of who is a shitty person I don't want in my life. If you insist on marking yourself, for the world to see on the outside, how vile you are on the inside, who am I to stop you?
It's your body your choice, but don't you dare think you're entitled to my respect.