"Long" hair on men

14Doth not even nature itself teach you, that, if a man have long hair, it is a shame unto him? 15But if a woman have long hair, it is a glory to her: for her hair is given her for a covering. 16But if any man seem to be contentious, we have no such custom, neither the churches of God.

Honest question...

Does Vs. 16 dismiss the standard of hair, or at least the contention concerning it?
 
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