A father can give any child, even a puppy, if he can perform parental duties better than his mother.
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What is the reality, theorist? If the mother does not lead an antisocial lifestyle and there are no facts of physical violence - the chances for the father are almost zero. It is written in the papers that the parents have equal rights and duties, in fact the mother does not have to prove anything at all, and the man must climb out of the skin, so as not to be a camel.