She talks about other guys?

My girlfriend enjoys bringing up other guys that she finds attractive..in fact, she brings it up a lot. For instance, there's one particular friend that she has who she thinks has an ok face, but a rockin body. We're both still in high school, but she teases me about it..like she'll be like "oh I'm just at my house right now...got back from hanging out with [this guy]" as a joke...just to tease me, whatever...and I'm cool with it. However, she seems to be kinda taking it a little far. Two questions here. 1) She brings him up randomly, when we're doing fun stuff :) she'll be like "yea [this guy] has that trait]" or something along those lines...... 2) I don't mind when she brings up her guys, but I brought up a girl that I thought was hot and she completely was distraught and told me that whenever she sees that girl now..it just..."bothers" her...wtf? What's up with the female here?