You are born of sex. Your every body cell is a sex cell, all your energy is sex energy. So if religions teach that sex is bad, sex is sin, they have condemned you completely. And not only have they condemned you, now you will condemn yourself. Now you cannot go beyond it and you cannot leave it, and now it is a sin. You are divided; you start fighting with yourself. And the more this guilt can be created in you – over the concept that sex is something unholy – the more neurotic you will become.