Let's say a PC attempts to punch herself. Can she do so?
- If the PC is willing and deliberate, can she miss?
- Does she make an attack roll? If so, what AC is she trying to hit?
- How much damage would it cause?
I was considering how this would work in general, but it would also be relevant if the PC was under a charm spell, or maybe she wanted to do it for social influence (like intimidation).