Unlike a few of the partners I've had, I refuse to sink that low. I don't manipulate the ones I love, and I won't stick around for someone I don't love. Funny thing is, I was propositioned in both of the relationships that ended with me being cheated on, and I declined every single time, even though they were generally more attractive than the girl I was with at the time.
If you can't fulfill your lust with one person, don't lead that one person to believe that you have any intentions of not breaking their heart while you reap all the benefits of their care and affection. To do otherwise is to be a deceptive piece of shit that never deserved the love or care of their partner to begin with.
It's also kinda disturbing how the mind of a cheater works. The whole human fallibility thing isn't what bothers me, it's that they can shift the blame of their actions entirely onto the person they cheated on, and actually believe it's true. Whether they pull some shit like "I wanted to break up, but I didn't want to hurt you, so you forced me into this" (because cheating on me before you break up with me is so much easier for me to cope with, right?) or "I was confused, you were holding me as an emotional hostage" (coming from a girl that had repeatedly rebuked me for trying to explore our emotions together... right)... just a total crock of shit excuse so they don't have to admit to themselves that they're worthless sluts that wanted their hand in my wallet until the very last second. They also love to tell all their friends that I was somehow the bad guy, so they won't be viewed as the skank that they are by their friends. One of them went so far as to tell her friends that I was abusive and controlling, so much so that one of her friends was threatening to call the police on me (she said it was for some other reason but I'm not a fucking idiot).
Anyway, my life actually improved considerably once they were gone. Since then, it's been nothing but short-lived relationships full of mutual respect and care. None of the drama and bullshit that came attached with the sluts in question. Life is good.