Love it!
When it first happened to me, I was pretty upset about it, but also turned on. I needed some time to come to terms with the idea. But the thought of my wife with someone else was a real turn on and it became good for our marriage. It can become dangerous when she meets someone who try’s to take her away. That nearly happened. I didn’t mind her going off with someone and for a time our marriage was open. She strayed, I stayed. Never minded “sloppy seconds”