Casual relationship has other rules?

Anonymous
So this guy is sharing his stories that he is causally dating someone (no labels) even though he has a girlfriend. So I told him he is cheating.. he comvined me it was not cheating coz they don't have labels.

So I didn't agru3 anymore. I just nod. I'm bothered when he said coz for me it's still cheating. Unless he and her girlfriend are in a casual relationship🤷‍♀️

Why he didn't tell her that he is dated someone else? The basic rule in casual relationship is to let your partner know even though you two are not commited 🤷‍♀️
Casual relationship has other rules?
Casual relationship has other rules?
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