No one is gonna die if your partner is cheating on you. Food or water etc are needs because we will die without them. Now people may say that if a breadwinner cheat, their partner can go hungry if the breadwinner decide to neglect but that's not really the case. There are legal provisions and govt programs available so no one would starve.

There was a time when husband cheating on wife could cause lots of hardship for his wife but that's not nearly the case anymore.

"Sex is not a need" is always touted as an all out excuse by low libido partner but LL partner would not die because of their partners cheating. If we reduce the relationship to bare essential needs then we need to apply it to all the things, not just sex.

I simply can't understand when would anyone think that they deserve fidelity from a neglected spouse. Whether those needs ( or whatever you wanna call them) are emotional, physical, whatever.

Fidelity should be earned, it shouldn't be default. Things have changed. You don't need a loyal partner to survive anymore.

Loyalty is a two-way street. It's foolish to believe that any other way is sustainable.