We used to produce the active ingrediant in BeanO (alpha galactosidase) as a standardized unit/g. Much lulz in the assay group...had one guy who would cock one leg up and yell "Calibration in process". We sold out that business, but the antics remained for quite a while, esp the "Girls can't do this proceedure..No Way", type stuff.
The standard fart unit was complicated...involved olfaction,volume,and dispersion factors predicted only in knowing the "WTF did you just eat" via survey, but you know we are professionals.
rot