The inbuilt deficiency in men and women is an inability to control the desire for sex - it's called lust. It manifests in different ways. of course, and not all men are rapists, nor are all women promiscuous. Men and women want sex without the natural consequences. We want sexual pleasure and personal "fulfillment". Why should we be denied these as our "rights"? We also want careers with good incomes to provide comfortable lifestyles. In a word, its selfishness. From a Christian perspective, life should be selfless and other directed.