Did he cheat because he didn’t like my boobs?

My boobs are smaller but I still have some. He cheated with girls with smaller boobs too also big

He’d always say he liked them and ask to see them etc but make jokes about them being small.

He does watch porn with people with the same body as me etc and follows models on instagram with the same body but is that why was he unsatisfied there?
Did he cheat because he didn’t like my boobs?
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