Yeah, they seem to stoop to people at their same emotional level. Looks, etc. don't seem to matter too much.
If it helps any and brings a bit of humor to the situation, I remember when my W broke up with OM1. She was with OM1 the whole time, but cheated on him with many OM. OM1 was the last one she had before she came running back. At this point, she had been moved out for a few months, I served her with D papers, etc. I was ready for a new life.
Anyhow, about a month prior to when my W came running back, I met a woman (recently divorced) at one of my friend's joint bachelor/bachelorette parties. She pretty much attached to me the entire night. I told her everything and was honest about my situation, but I felt "single" I guess. She was gorgeous, and seemed to like all the same things I did and was infatuated with me - after being treated like crap for so long, having a person be that into me was a major relief. She was like a female version of myself. We hit it off needless to say, but she lived out of state, so it didn't and wasn't going to work out. But she flew up a few weeks later just to hang out with me. We decided to go dancing at a bar with a live band and ran into OM1, who was balling his eyes out that my W dumped him. The woman that came to see me laughed and said, "she left you for him?!?". I got quite the ego boost from that.
Then he saw me...he made eye contact, and I just gave him the most evil smirk I've ever given. He left not long afterwards with tears in his eyes. lol. I think he thought I was going to beat him up or something too, but I just let karma do its dirty work.
Literally, 2-3 weeks later, W came running back. It is like she sensed my heart straying. I will admit, I was infatuated with this OW, so maybe I was starting a bit of MLC myself. Or it was just the ego boost of being treated like a human again...I don't know. But I still get a kick out of seeing that POS OM crying his eyes out.