I cheat all the time. No quality woman of any substance will be ok with you telling her that you're going to continue fvcking other women while you're with her.
However, my last experience really taught me a good lesson. I hurt a lot of people. You can read the details of my story in this thread:
http://www.sosuave.net/forum/threads/gf-found-out-i-cheated-can-i-turn-this-around.238555/
As you can see, three people were devasted by my actions. I caused a lot of pain and as you can see from my posts I regret what I did and feel really bad about it. I tried to justify my actions based on technicalities but basically I knew what I was doing was wrong. When I'm caught or there are strong suspicions of my cheating I generally deny, deny, deny but with my recent situation I was caught red handed with the two women involved actually speaking to each other and sharing details and dates of when they saw me and what we did. So denial or milking the facts was not an option.
I felt embarrassed, I felt like the biggest as*hole, and I felt really bad about it. I felt really bad about myself. I actually cared for both the girls involved a lot and even got depressed over what I did. It hit me hard I was surprised and how negatively it affected me. Seeing them cry and yell and realize I had lied to their faces and ruined their dreams of a good boyfriend, relationship, and marriage really made me look down on myself and my actions. I still feel really low about myself for what I did.
That being said, cheating is the dark side of spinning plates - a concept which is so important for guys to apply these days in this terrible dating market.
It's ok to be able to date lots of girls in the beginning of a relationship but it gets murky.. at what point do you tell the girls you're seeing that you're banging lots of other women? And at what point do you decide to put all your eggs in one basket and focus on one woman?
These decisions and choices aren't always so clear cut.