Is cheating overlooked the younger in age you are?

For instance 14 - 16 yr olds. I imagine people don't consider "boyfriend/girlfriend" has any true meaning and is just practise relationship.

What about 18 to 20? It's unlikely partnerships are going to be forever relationships. So do people care much if one cheats and they break up?

What about 20-25? Considered should be more respectful and relationships more serious?

And over 25.. definitely people are expected to act morally and respectfully right?

I'm not just talking sexual cheating. Any cheating as in getting with someone else.

Is cheating overlooked the younger in age you are?
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