I have a ton of questions here but first - why one would someone wanna sniff their dirty socks? I mean EW! But according to Health, someone did every day and well they got hospitalized with a severe lung infection!
"Smelling your socks seems like a harmless habit—but not if a potentially dangerous fungus develops in your footwear, which is apparently what happened in this case. When the man inhaled his sock odor, he inhaled the fungus as well. It entered his lungs, causing an infection characterized by chest pain and coughing fits. The man went to the hospital, where he received his diagnosis."
So please remind me to NOT do this!