I would be curious to know when "Bailey's + Coffee" became a thing (i.e. drinking it warm versus cold)
Coffee usually needs sweetener + cream. The thick cream + sweetener + special taste + alcohol of Baileys make it a perfect for coffee.
It's the easiest, dumbest, best drink possible in a Canadian winter.
[0] https://www.ars.usda.gov/ARSUserFiles/80400525/Data/retn/ret...