Paulo Coelho said this quote

Make sure that when you touch the other person, all your five senses are working, because sex has a life of its own. The moment you begin, you’re no longer in control; it takes control of you. And whatever you bring to it, your fears, your desires, your sensibility will remain. That’s why people become impotent. When you have sex, take with you to bed only love and your senses, all five of them. Only then will you experience communion with God.