Interesting?

I've been reading The Mind Body Problem, by Rebecca Goldstein.  The novel centers around the relationship between two characters, Renee and her husband, mathematical genius, Noam Himmel.  Theirs is, from the outset, a terrible mismatch -- simultaneously painful and  intriguing.

At one point, the book delves into the question (from a philosophical and mathematical standpoint) of whether sex is interesting.  So, I've found myself pondering...  Is it?

There's the, more or less, ubiquitous set of sensations.  For all the variation among us; size, shape, color, temperament, appetite, belief...  the range of human sexual experience is pretty similar.  Those of us in the BDSM community tend, I suspect, to think we've concocted a wider and wilder range of sexual experience, but even with our kinky repertoire added to the mix, the sexual sensation catalog only has so many pages.

Once we have, ourselves, crossed the line that delineates sexual imagining and sexual fantasy from sexual experience, the extent of the territory to be explored is bounded.  From missionary position, one on one, penis in vagina copulation, through the realms of tantric pleasures, and on into the varieties of power exchange and sadomasochistic play, there are only so many sensations that can be wrung from the human frame.  We may pick from the menu of options.  We may combine the elements in a dizzying array of possibilities.  We may achieve orgasms, in singles and multiples, and in whatever order, individually or as couples.  We can wash, rinse, and repeat until we wear ourselves completely out.  And then what?  Once we've poked and prodded and stroked and wrestled one another into sexual delirium a few hundred or a few thousand times.  Once we know all the angles, and every nuance, and every single moan and sigh ...  is sex interesting?

What say you?