can I look too? is this too much jealousy?

I love my man and we have been together 11/2 years. Our first date lasted from 7:30am-9pm. He took me hiking at Estes park in Colorado and then we went to the downtown area there and talked and that is when he told me that he likes me and wants to pursue a relationship with me. He's such a romantic most of the times and I love that about him. One thing that was a red flag for me on our first date was that as we were driving in the downtown area, I was in the passenger seat of his car of course, a lady crossed the street in front of his car wearing a white blouse with half of it unbuttoned and her cleavage showing and he was the first car parked at a red light. Tell me why he broke his neck starring at her and then turned back and looked at me ashamed, embarrassed and asked "u saw that?" Of course I said yes. 
Well I left it in the back of my head but since we have been together, he always stares at women. Like always! He has a thing for thick women and I happen to be small and skinny so I do not know why he is with me. I feel insecure but I always tend to notice when he stares and checks out women and he would always catch me see him and act like the kid who took a cookie from the cookie jar when he knew he shouldn't. People look, I understand that completely however I don't like the hypocrite behavior. When he sees me glance at a man he automatically says "u think that man is handsome huh? His body is nicer than mine" and makes a deal of it the entire time at the gym. But if I was to say yes I saw u look at this chic he would nervously laugh and deny it. 
I decided to give him a taste of his own medicine and look just like him but that didn't work because he'd use that against me and deny he ever looked at Womens asses or boobs....that's not fair. Has that happened to nay of you before? How did you handle it and did the way you handled it work for you? 
Also I talked to him about it and he said he's now scared to look at women because I may make a big deal of it but he still looks he jst nervously laughs and denies it now. 
I call him out all the time but it's always the same laugh and denial 😔 I don't think I'm going anywhere with this method.