There's just something about it.  The knowledge that you don't know. That she knows more, and is teaching you.. little by little.. witholding things.  Keeping from you things that may blow your mind, at least until the right time... when she decides it's time for you to know. 

A young man finds himself eagerly holding his balls in his hands... nearly quivering with an inner sensation of his body knowing it is about to receive pleasure.. and to give it.  He watches a woman his lover but other men's lovers as well step out of the clothes she wore where other people could see her.  She exposes herself in just the way she would to a husband, or any other lover.. to me.  And I see from the vantage point of a man.  Any man.

"Just" pleasure. "Just" lust.  "Just" the most glorious pair of bouncing tits, oiled and in your face as she rides you like a pony, sitting in your lap facing you.  On days like today when I am by myself it is consolation and frantic torture to know:  This happened.  This happened.  This happened.