Intercourse. Or, if your physiology and/or sexual orientation preclude that, then go by whatever the next best thing is for you.
Never, nor do I have any particular desire to. I've always related to sexual intercourse in a more "spiritual" manner anyway. If I find a lifemate, I'll get back to you.
Last Sunday morning before the small fry awoke... ...oh, the joys of not having to trudge off to church on Sunday mornings.