Should I be concerned that my girlfriend finds other guys ually attractive and tells me about them?

My girlfriend feels so comfortable with me that she tells me about guys who she finds to be very physically attractive. Whether the male she brings to my attention is a professional athlete or a celebrity from motion pictures and television, my girlfriend makes me a bit jealous when she tells me that the object of her admiration is "cute". If she doesn't tell me this then she'll feel she can never be herself around me. And to me this is undeniably important. I don't want her to keep her feelings hidden either. Consequently, she and I have devised a way so she could freely express such thoughts -- but only she and God know if she's fantasizing about having with these men. That thought alone provides me with discomfort. Should I be concerned about this? So please, if you can, tell me what would be a viable solution here?