I'm having weird thoughts

So my bf has dated 1 other girl besides me. She was the one that took his virginity. Is it weird I want to see her naked? I'm straight as straight can get! I just think it's weird that I'm so curious what she looks like naked. She's super pretty with very big big boobs, where as I'm the opposite of having big boobs. Has anyone else ever had these type of thoughts or am I just a crazy person thinking of weird things??!