The first time I heard this reference was from a competetive eater. It was on some show where they were interviewing a guy and he or a friend of his made a reference to the meat sweats. I would imagine if anyone would get the meat sweats it would be someone who just pounded down 60 hot dogs.

But what about the smell?

You do realize that getting someones DNA through 23 is probably the hard way of getting it right? I mean if some shady group wanted to use your DNA in some dark plot against you obtaining your DNA would probably be the least difficult part of the entire plan.