Their world view stems from selfishness, immaturity and a sense of entitlement.
I stand by that statement and say yes, this blanket statement applies to ALL cheaters.
1. Selfish - They thought only of themselves. They put themselves and their jollies, their "feelings" first. They didn't care about the collateral damage. They may not be selfish in everything or for their entire lives, but having an affair is the most callous and selfish act imaginable. They ignored the little voice telling them what this would do to their spouse, their children, their friends, their family, etc.
2. Immaturity - Giveng all of the other options (working on the marriage, leaving it ethically) they chose the easy path. They were not emotionally or ethically mature enough to do the decent thing. They couldn't stop themselves.
3. Entitlement - "I deserve to be happy", "I sacrificed for everyone else all these years, now it's MY turn", "You weren't meeting my needs". If any word describes the actions of someone who has an affair, it is that they feel entitled. My "happiness" trumps yours.
Could we all cheat given the right circumstances? Maybe. But there is something in the thought processes of a cheater that allows them to more easily do it than most and then rationalize and justify it in order to live with themselves.
H:54 W:46 D:11 D:21 M:12 BD:1/15 In-house Separation 2/15 DB started 7/15, W sees consistency 9/15 Dropping the rope and having her leave 2/16, moves 5/16 Reconciliation 1/17 Obviously still struggling