Why does my balls smell like ham?

My roommate told me that every morning, he smells an odor that somewhat resembles a piece of ham. It was strange because I'm pretty sure that there's no ham in our room and that I don't smell anything.

One night, when my girlfriend and I was "doing the dirty stuff", she commented on the smell of my balls and said that it smelt like ham. Should I be concerned now? Should I go to the doctors for this? HELP
Why does my balls smell like ham?
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