I'm starting to smell like my boyfriend, is this common?

So I'm sure I'm not the only one who enjoys their own scent. I could smell my junk and no matter how sweaty and stinky it is, I could never be repulsed by my own scent. However, just recently, I noticed that my balls are smelling like my boyfriends which is a totally different musk than my own. I'm not complaining, I just find it interesting. Has this happened to anone else?