"Just remember one thing: never make love to a person you don't love. That is a perversion—because then you will remain obsessed with sex. Make love to a person you really love, otherwise wait — because when you love a person, the very love will pull the energy upwards. And once the energy has started moving towards love, love is so satisfying that who bothers about sex? Sex has never satisfied anybody.
It creates more and more dissatisfaction. Sex has never fulfilled anybody — it knows no fulfillment.
Have a sexual relationship only when you have a loving relationship, so love and sex become associated. And love is a greater center, a higher center. Once sex is hitched to love, it starts moving upwards. Once you feel that you are loving, then never go to pray in a temple or in a mosque or in a church—that is foolish. Then again do the same as you did in the first place: your first prayer has to happen with your beloved or with your lover. Either before you make love, let there be prayer; or, after you have made love, let there be prayer; or—and the third is the best—while you are making love, let there be prayer.
If love becomes joined with prayer, then it can hitch-hike, then it can be pulled by prayer. Love has to pull sex energy up, and then prayer has to pull love energy up. Once you are at the point of prayer, SAHASRAR—the one-thousand-petalled lotus in your head—opens. It only opens at the moment of prayer."
— OSHO, Discipline of Transcendence Vol 3 Chapter #2