Can't have a side chick if you don't have a main chick!
Quite right. And nice presentation.
Yet I was also thinking of a more nuanced scenario. Got a chick. In principle theoretically able to get another. But not exactly having it right up ones nose.
Someone said "Fidelity is a matter of opportunity". (some weird German music star which won't mean anything to you).
I don't think that is entirely true. I do think this is very true.
."if you've committed to a relationship and tell your partner that you're not screwing anyone else, and then you go do the thing you said you're not doing, that's a total dick move"
You keep arguing morality, when I am arguing humans.
You know what else is "a total dick move"? Spending money to play virtual games while there is a food crisis in the east of Africa right now. Making people suffer more than you ever have, right now.
If you play the morality game, chances are you gonna loose.
Frowning upon the betrayal of a spouse, I think, extends beyond "path of least resistance" territory
Nothing expands beyond that. People are like lightening. They always take the path of least resistance. It is just our luck that we can change what resistance we feel and that we channel resistance to be faced with reward to be had. In other words: Our thoughts always carry emotions as baggage and henceforth with the power of our thoughts we can manipulate the resistance coming our way. But we will always choose the lesser resistance. One way or the other. But it is truly amazing what ability we have to make this count.
To meaningfully contribute to this discussion, you need to first ask yourself: Why am I really doing anything? And what role do moral ideas play in it?
So far, you clearly have not done so.
edit: I almost forgot:
Just sayin'