Salespeople

I've always enjoyed looking at salespeople. Not those who stand behind the counter in shops (in the USSR, those always had a surly disposition), but those who carry their merchandise on their person and try their best to attract the prospective customer's attention. Over time, they seem to merge physically with the stuff they sell. This merging had a great appeal for me, and it eased the task of "turning all the objects being depicted into a single, monolithic whole".