I re-read my piece and couldn't find anywhere I made sex sound ugly or immoral. I agree with you most people were brought up to be monogamous, but I make no moral judgment about those with multiple partners. I was exploring how - for some - being cheated on is almost unbearably painful and scarring. We also agree there is nothing filthy about sex and that it's a human desire. Thanks for the engagement, Marsiam, I appreciate it.