After each mission, someone (Rumlow?) gets off while sniffing the Asset's used underwear.

+The sniffer over-exerting the Asset specifically so the underwear will be more ripe
++The sniffer picking out underwear for the Asset to wear on missions, from jocks to slutty briefs
+++The Asset being forced to wear the same pair for days at a time; he struggles to tell his handlers (with his limited conversational ability) that he needs a fresh pair and they refuse/mock him