Would it bother you if your partner saw an attractive girl on tiktok, went to her page to watch more of her videos?

Mind you we are in our 30s and have three children. I’m a stay at home mom, so it’s not often I get a break to make myself feel beautiful. So that really left a sour taste in my mouth and made me feel bad. I absolutely don’t mind if he finds other females attractive, that’s human nature. It’s just the principle of things. But he says I’m overreacting and being petty. Can someone help me understand this? He says “I’m not nor would I ever cheat on you/ message them” so why does it matter?”