My hubby gets defensive when I don't make gud judgement on girls/exes he's been with? does that mean he still?

We have a good relationship, but whenever I say negative things about girls who he had dated, or likes, or think they are sexy, or his ex-wife, ex-gf... he gets all defensive saying I don't even know them and they are not bad like I think. I only hear the bad side from him but in reality he was inlove with them even when he supported them most of the time. I, on the other hand supported him through the relationship more than he ever had from another relationship. I may not be the smartest or prettiest girl but I don't dig gold, nor do I take people for granted. I work hard and goes to school. I do analyze people but it doesn't mean I hate them unless they did something bad like his ex wife who made him pay $1000 in childsupport when she say never will. I had to make the extra to pay the bills because his income don't cover but yet he gets defensive and when I talk about a girl who he mentioned was hot. Truth is I wanted to really see if he still has feeling for them but I guess he just show me he does. I know I mean nothing to him but treated him the best that's why he married me. He never was really inlove with me because I am goody goody person and a parent who don't party, drink, smoke or anything but workout and take care of my life with my kids.