What's the most basic thing you can't do?

Funnily enough: I am a paramedic with special training in phlebotomy, worked in anaesthesia and did roughly 10.000 blood draws and iV lines in my life.

I am still having a hard time if someone else draws blood from me - I got accustomed to it due to chronic diseases that required a lot of blood being drawn. But: I can without any problem draw my own blood. It's a bit complicated with only one arm,but I can do that.

(And if you want to put a needle anywhere else beside a vein and a intramuscular vaccination and I need full sedation)

That's how the wizards get you.