Intimacy is a form of relaxing and opening with/to another. A palpable form of trust. There's nothing else like it in terms of feeling whole and connected. For me, sex builds on that and is the creative flowering of the plant full of passion and intention to please. It's kind of a yin/yang kind of thing. Intimacy and sex, can exist one without the other, but the combination of the two is sweet oblivion.