Bong here,
the only time I wear my shoes indoors is when I go to my friends house, as he owns a bigass dog and hardly cleans his floors; hair, crumbs and shitknows what else everywhere. Better to get it under shoetread than having to clean that shit off your soles/sacrifice a pair of socks
I presume the same applies to Lards and everyone else. Pets are good but fuck me they're filthy.