Answer: Spouses expecting fidelity from each other
Step-by-step explanation:
These are the rules that nobody writes them down but the majority of people agree on them and they get their meaning , they are crucial and they play big roles in society .
They are not legalised or formalised however by using our common sense and looking at the roles played by these norms , people will personally abide by them.
The example that is most common probably throughout the whole world is pattern that we follow when we go to withdraw money from an ATM.
A person will know without being told that they don't need to stand too close to the person withdrawing the money , since everybody knows that looks suspicious.
We follow this every time without being told we have to .
This also applies to fidelity nobody tells you that you should expect someone to be loyal and faithful to you , it's an unspoken rule but that makes total sense to everyone and it plays a big role in protecting families and everyone knows without being told that being faithful is a right thing to do .
If they happen not to be faithful they will always feel guilty .