(Strip Number 308, Original Publication Date, 23 August 1982)
Panel 1: Having retrieved a pair of gym socks from his rain boots, Elly asks Mike how long they've been in there.
Panel 2: He baffles and disgusts her by telling her that they haven't been in there all that long; his blithe admission that they've been aging a couple of months causes her to stare the goggle-eyed stare of existential horror.
Panel 3: As she turns green from the fumes, her idiot son with the defective sense of smell asks her what's wrong and then if they need washing?
Panel 4: She tells him "WASHING?? Michael, these are KILLER SOCKS!"
Summary: About the only way it's possible that Mike was unable to be revolted by the stench of dirty socks jammed into boots for weeks on end is if he has no sense of smell; that, or Elly's horrible cooking has inured him to nauseating blasts of odor.