There are kisses and kisses. Some are given in sport and some in passion. There are formal kisses of greeting and departure, and there are perfunctory pecks of accustomed affection. Once in a great while lips meet and two spirits merge for a time and the universe is right and complete and the planets wheel in their proper places. Once in a while the lonely, broken spirit of man is healed and made whole. For a while his quest is over and his questions are answered.
She lay quiet in his arms. "Oh, Perry."
--For Us, the Living: a Comedy of Customs, by Robert A. Heinlein