I "tolerate" infidelity (or something like that)?

It can be a somewhat controversial opinion/attitude. I was born and raised in a very conservative environment, although my thinking is mostly very progressive, I still have things of the old school instilled by my environment. My parents had a difficult marriage but where duty and commitment always mattered, my whole family is married and although as all marriages have had their conflicts, they are all still together. The situation is that I have noticed that I am not usually shocked by what seems unthinkable to others, for example: infidelity. Although it's not something I promote or condone, I feel like I have an expectant attitude that it will happen anyway (so there's no reason to make a scene). It's just something I don't want to know if it happens or get me involved (for example, another girl looking to fight me) or my partner having children with that other person (if he doesn't have children with me and he gets someone else pregnant, I would leave him to was father of the child). However, if it's an "adventure" I can just live in ignorance, honestly I find it exhausting rummaging through something I don't want to see. As long as he fulfills his other commitments to me (taking care of me, leading a home life, doing his job and collaborating) I'll be fine. It's just that for me there are many more important things in the relationship. I talked about this with my friend and she was horrified, do men also think the same?
I "tolerate" infidelity (or something like that)?
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