Is my partner bound to cheat if given a chance?

We were driving towards this random girl and he said “why is she walking like that” we get closer to her and he gasps and said “OH” like he was amazed at her beauty. She was beautiful. Not tryna be insecure but I’ve had a tough day at work and for him to do that just makes me feel like shit? Is this normal? Just wondering if I’m over thinking or maybe he should just keep it to himself next time. Instead of gasping at beautiful girls in front of me. I feel offended should I be?
Is my partner bound to cheat if given a chance?
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