A pyro main is someone that can’t play any class that takes skill (not saying pyro doesn’t take skill) and will camp with his flamethrower which will usually be the only weapon he uses and wait for people to pass by.
heating up the top end of a cheap lighter for 1 minute then quickly placing the top of the lighter u heated up on your hand and holding it down for 15 seconds....... this will hurt but it is the mark of a true pyro