Why do men never admit that they are wrong?

I know that this is not a usual post for me, but I need to get all my anger out somehow and unfortunatly, you guys are at the end of the stick ;)

Why do men never admit that they are in the wrong? Me and the boyfriend are currently in an argument becasue I have had enough of him telling me how 'fit' the girl behind the counter at Maplin is and staring at her while i am with him and how he has slept with 40 plus girls, look at a picture of a girl he knows on his friends phone while she is dressed in a sexy schoolgirl outfit while i am there and then to top it off, the other day with his friend, he thought it was acceptable to discuss how lucky his friend was to have gotten lucky with another girl who was...yep you guessed it...Fit...while i was there! Now I know all men talk about girls when they are together, but please, do it when your girlfriend isn't sat with you, right?

It's not as if I'd sit there and talk about how fit the guy at the gym is or how gorgeous my collegue at work is, or that my best friend is lucky because she has slept with the GOD of all Sex Gods while he was with me.

And then when I finally brought all this up and told him it was disrespectful and made me feel unattractive and useless when he spoke about other girls this way in front of me, he couldnt see what he had done wrong!

I told him that while it was fine for him to go on about Rihanna and her fit legs, or go on about Frankie out of The Saturdays and how 'proper sexy' she is (and I always have some form of fit when The Script comes on in the car as I am in love with Danny, and I always swoon over pictures of Ryan Reynolds in magazines while my boyfriends there) because that is just a couple having a laugh with eachother, but when he starts saying all this about girls that he could actually go and sleep with if he really wnated to, because he actually knows them, thats when its a huge no no...

Am I right? Or am I wrong?

Rant Over!