men&woman

little thought experiment:
male A is going out with female B. Nothing to serious, no kids, no semi-detached house(yet), perhaps they share a flat, who knows. Extension, they are married, does this actually make a difference?Now B meets male C. Male C is a stereotype single male, good at hsi job, loves it, has a "empty" flat with interior from habitat. They get intrested in each other. He knows about A and the relationship between A and B. Can someone think of a reason why C should feel constrained to say No! to B if things that are considered cheating are going to happen? If both of them are not drunk or A and B just had a fight. Should not B be the one to decided?
The obvious answere people are giving is stuff like

Its not fair!
Would you want to be A?
It is something you do not do!
Moral!

I can think of a load of reasons why C should say no but thats something completly different. There is a load of stuff you can talk about in this problem but I am just interested in an answere to this particiular problem. Not what happens afterwards or anythign like that
Thank you for using soem brain cycles to think about it