Can cheating ever be justified?

So my current boyfriend was mad at me for a few things I did to him. He was so mad he says “I’m starting to see why ______ cheated on you” he can see why my ex cheated on me. I may have been a pain in the ass to my ex but never cheated on him and don’t agree with that type of behavior. With the result of his cheated he even gave me a std that my current boyfriend knew my ex gave me.

Can cheating ever be justified?
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