Cheats and Liars

I will never understand guys who cheat on a good woman, or anyone who cheats on their loving partner with someone else. I'm speaking specifically of couples that are genuinely happy together, but one cheats on the other anyway. I know people make mistakes, and trust me, I forgive mistakes (like all of them, all the time). It's a flaw of mine. Instead of second chances, I end giving 3rd and 4th chances. And I know I am guilty of making mistakes; I'm human too! But people who set out to intentionally cheat on their partner bewilder me. Why? Why would you ruin what you have? If you're living with your partner, do you want to sacrafice the warm, loving house you come home to after a long, grueling day of work? Are you willing to give up those moments when you look at your partner and realize that you love them more than you imagined you could? Are you willing to lose any sort of beautiful future you could have had with this person? You're fine with watching them walk out of your life, potentially forever? Not to mention the effect on the one who got cheated on and lied to. That person will probably have trust issues for a lifetime, or at least until someone else comes into their life and proves that people are trustworthy and loyal. They may wonder "What is wrong with me?" and blame themselves, even though it is 100% not their fault if they were truly committed and happy in the relationship. It can cause low self-esteem, anxiety, depression, just to name a few. Obviously, I am speaking from experience. I've been cheated on by someone that I thought was genuinely in love with me. I saw our whole future in the stars, but I was wrong. It's hard to forgive someone who cheated on you and remain in the relationship. You never stop wondering what they are doing when they are out, and unfortunately, it stays tucked away in the back of your mind, like a monster in the closet, just waiting to pounce when your guard is down.