While recently out on a girl's night out, I was reclining "elegantly" on a sofa in an Oxford nightclub, after some particularly vigorous moves on the dance floor (and just a few of those revolting girlie confections that pass as alcopops).
I had recently lost a toenail due to running, and my feet were battered and bruised to say the least. Suddenly, a guy comes over and starts LICKING MY TOES in particular, the specimen with no nail (I'm wearing tights and sandals). I was stunned to say the least- all I could think of was how revolting my feet were underneath.
Not really a running related story (apart from the missing toenail), but I'd be intrigued to hear of other people's most yucky feet-related episodes.