Is holding hands with another person considered cheating while in a relationship?

Now the answer may sound obvious to most but hear me out. I am writing a science fiction novel and there is a sub plot romance. Even though the guy has a boyfriend he falls for another guy and leaves his boyfriend for the other guy in the end. But way before they break up, the main character who has a bad actually reaches out his hand to the other guy and holds it. Keep in mind that he is still in a relationship when the hand holding happens.


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Is holding hands with another person considered cheating while in a relationship?
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