Any and all reasons welcome. Preferably from guys.
Most Helpful Guy
I believe cheating is the most direct way of telling your partner that you don't care about them, which is definitely why I would never do it.
That being said, the other guys I've known in my life who do cheat either have insatiable libidos, or they're someone who always thinks that something is missing from their current relationship, when in fact it may be perfectly fine and they just don't appreciate the other person. Or, they think something's missing and seek it out from someone else, rather than talking about their feelings with their significant other instead.1