I can tell you it's probably not really because of sex. My stbXH was getting it every night (and sometimes twice) because I was willingly giving it. I was only away from home three days when he slept with his skank. And for just that once (though it's probably been more since) he breaks up our entire family.
It's definitely not the sex. That's just the excuse you're H is using. Mine's using the "she listens and cares about me."
BluePoet
*M:50 WAH/PA:47 *M:29+ *Bomb:10/13/06 *Sep:10/17/06(me in house) *H wants D-11/30/06 *01/08/07- Me - NG, New R *2/26/07- filing of D *5/29/07- D final *08/25/07- Me - New R ends. - is ex-h living with OW? *D:32, S:24