@dcc @Terry its well established that smell is our sense that is most associated with memory.

Feet: smells like feet

Armpit: an individual scent, dependent on how much the person has worked, shaved, or washed. It smells of home and hearth, of familiar places and times, of a day not yet complete, but a person nonetheless. It is simultaneously a sign of "unclean" and also "having worked an honest day" as a spouse ought to do. It is the very essence of familiarity, love and respect.