Welcome! 
Gingerbread,
You're correct on the part of cheating is not love, most people who cheat are driven by their curiosity to try something different by someone different, but what about the person that they are with? An act of betrayal the ones that they are with is just wrong in my opinion. People who cheat are just lying to the ones that they are with, lying about their true feelings that he/she has for them, and not understanding their level of commitment.
And when a dishonest cheating behavior is pointed out, it is very difficult for that person to accept that he/she is the blame for the fall out of the relationship. They start finding other excuses why the relationship wasn't working out. It's not going to help the person who's been doing all the cheating, stop making the similar mistakes in the future. That's why I always believe this phrase "Once a cheater will always be a cheater".
Unfortunately, if someone is going to cheat, ask yourself one question, is it worth to cheat if you really love someone? 
