When I worked in the office, Chuck would arrive in the morning smiling, singing & asking how I was. I would turn to him, glowering my disapproval and this was my response. Apparently, he drank his coffee at home.
I honestly don't understand the purpose of decaf coffee. Why on earth would you purposely put a liquid into your body that makes you poop and you don't even get the caffeine? It makes no sense to me. Thus, useless.