You ask me about sex. That energy too belongs to God and through meditation it too can be transformed. No energy is bad but there can, of course, be wrong use of energy. When sex energy flows upwards it turns into brahmacharya (celibacy). It is good that you are becoming detached from it but that isn't enough. You have to go through it to transform it, rejection just leaves you arid and dry! It is true you are not alone in your sex life but sex is not essentially of the body at all but a modification of the mind. If the mind is completely transformed it affects the other person too, and one who is related so intimately is quickly affected. Keep in mind that: there should be no calculated ill-will towards sex - cultivated detachment is useless: stay aware whilst making love, be a witness in this situation; if one can stay in a state of meditation and right-mindfulness then the sex energy can be successfully transformed. Brahmacharya is a complete science in itself and many doors to bliss open on that path. Still, the very first thing is a friendly attitude towards all one's energies. Enmity towards them does not lead to spiritual revolution but to self-destruction.