Its actually the biological nature of men - similar to why everyone thinks babies are cute.
Anyone talking about biological nature of anyone is a complete and utter moron.
Its like saying only females can get pregnant.
Its a biological fact.
Men are inclined by nature to protect and do courtship around woman to have their genes survive in the next generation.
I dont think thats moronic but just how evolution made men (at least most men, exceptions always exist i guess)