This is not about men loving their own bodies in the sense that they pamper themselves, spend hours in front of a mirror, and pander to the flesh. We should think of it more in another way.
A husband needs his wife like he needs his limbs. ‘You are complementary beings’, says the apostle. He needs his wife's intuition. God has put husband and wife together. He needs her special level of human perception, which he lacks. He needs her sensitivity to human situations, and to other people's feelings. He needs her observation. He needs her angle on things. He needs her energy and, very often, her restraint. He needs her expediting faculty; and without doubt the fairer sex has a very superior expediting faculty. He needs her way with the young, and her unique abilities with the children. And all he invests in her is returned tenfold.
And he also needs her intellectual co-operation and input, and we have to realise this. To ignore her or take her for granted, to slight her or not to help her or encourage her or strengthen her in different ways, spiritually and physically, is just utterly foolish. It is absurd, it is ridiculous. So, that is the reasoning of these verses. ‘So ought men to love their wives [ because we belong now to each other, we are each other's property] as their own bodies. He that loveth his wife [ultimately] loveth [or in the sense of ‘takes care of’] himself. For no man [except a fool] ever yet hated his own flesh, but nourisheth [interesting term, because the Greek actually means ‘trains up’, ‘nurtures’] and cherisheth it, even as the Lord the church: for we are members of his body, of his flesh, and of his bones’.