And yet this affair, I sensed, was necessary for me to move forward with my marriage. It was a test. I believed, but could not be sure, that just as sex had cooled for my soon-to-be husband and me, it would cool with this man, with any man, no matter what or whom  in which case my fiancé was the person I wanted to marry.

Except suppose I was wrong? Suppose there was someone out there with whom I could have passionate sex the rest of my life? So I continued with my conservative Christian, and we had fantastic, obsessive sex while the whole time I waited to see when (or if) this affair would run out of fuel. I prayed that it would, so I could marry the man I loved.

Actually, I never had intercourse with this man, though we did just about everything else. He did not believe in sex before marriage. Therefore, when my fiancé asked me if I was “having sex” with someone (why was I coming home at 3 a.m.?), I could answer “no.” On the Christian man’s end, when his God asked him if he was having sex with someone, he also could answer “no,” and so we both lived highly honest, righteous lives filled with perpetual sex.

But then the inevitable happened. Sex with this man turned tepid, then revolting. While the revolting part was particular to this crazy relationship, the tepid part was wholly within my experience and proved, for me, that there is no God of monogamous passion. Thus freed from the tethers of this affair, I returned to the gentle arms of my pagan husband. We are going on our 10th anniversary. He wants hot sex. I turned tepid long, long ago.

A University of Chicago study published in 1999 found that 40 percent of women suffer from some form of sexual dysfunction, usually low libido. There are treatments for this sort of thing: Viagra or a prescription for testosterone. But the real issue for me is that I’m not sure I have a dysfunction. On the one hand, I am miserable about our lack of a sex life because it makes my husband miserable and cold and withdrawn, and it is so unhappy, living this way. “Have sex with someone else,” I tell him.