For example...
I always smell the milk before I pour it, (or drink it if we are out somewhere,) to make sure it's not spoiled. Stems from a terrible cereal incident when I was a kid, I don't get into, but lumps were involved. People will laugh and say, "The use by date is on the carton."

One couple, really good friends of ours, had invited us over for dinner. We had a great meal, she had picked up a pie, made coffee. She knew I took cream and sugar from their visits to our place, so she set the half gallon of milk out. I unfolded the spout and sniffed. Nope. They were laughing until I set it across the counter.
"Yeah Right," she said, " It's just a few days old. Her husband picked up the carton and sniffed, "Pour that out, I'll be right back..."
I told him I could use non dairy creamer... "Two blocks..." He called over his shoulder. "
He was back in ten minutes, and set a new quart on the counter. I opened the spout and sniffed. "Really?" He said. "I just got back from the store."
I sat it across the counter. "Not funny." He said.
" Not kidding, " I replied.
Sometimes I like the coffee with powdered creamer.

His wife called later that week.
"Thanks, now you have Bob sniffing the milk.".
