The Republic by Plato Part 3 Page 60

No, indeed, Socrates, it must never come near them.

Then I suppose that in the city which we are founding you would make a law to the effect that a friend should use no other familiarity to his love than a father would use to his son, and then only for a noble purpose, and he must first have the other’s consent; and this rule is to limit him in all his intercourse, and he is never to be seen going further, or, if he exceeds, he is to be deemed guilty of coarseness and bad taste.

I quite agree, he said.

Thus much of music, which makes a fair ending; for what should be the end of music if not the love of beauty?

I agree, he said.

After music comes gymnastic, in which our youth are next to be trained.