Why do boy children push mother's away when she tries to hug him?

I have seen boys say no to hugs from. Mum why?

She should give him space to develop
It's annoying when they do it because the same women must clothes, educate and put a roof over their little heads and food in their little plates
Let us leave the boys to grow mature and develop, can we do that?
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Why do boy children push mother's away when she tries to hug him?
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