I play this game a lot with my ESTJ cousin and yeah, it can really be hard. I've learnt to like it though, it makes you confront your own insecurities. It may be super hard too, I know.
I think they treat it like a game. And: do not show them, when they've hit the sore spot! It's like pretending: no, it didn't hurt.
That's a rough game, but boys play it. All extroverts, I'd say. To be honest at the beginning I didn't like it too much either. It was the ETxx guys game.
I hope this helps! Tell us later.