Girls being too polite?

Once, while I was at the course, I was sitting somewhere and chatting with a girl and I said to her, 'How strong you are, punch me so I can see your strength.' I said. Then he said to me, 'I don't want to act in ways that could harm people, except when I'm angry.' said. How much damage can one punch do to a person, when he talks like that? The girls in general are really very polite. What do you think are the reasons?

Girls being too polite?
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