Dear cashier at the supermarket, convenience store, etc.
I have a humble request I feel I have to ask of you. It's minor, it's a little silly, but hey, it's a pet peeve of mine.
Could you, upon scanning in my cat food and milk, maybe not make some stupid comment about how I'm making the world's worst cereal?
No really. Could you, for a second, just go with it, instead of calling attention to what odd combination of needs I'm buying here? Maybe just ignore it, instead of acting like I must be some kind of retard? Perhaps you could just accept that I want milk for my cereal, and food for my cat, at the same time?
Oh, it was a joke? Oh, cool. Cool. I guess I can find the humor in it. Maybe I can even laugh at it.
Oh wait. Everybody else in line is also laughing at it. No, at me. Thanks.
Honestly, this bothers me a lot. In fact, the worst example of this didn't even happen to me, but to someone else in front of me. They were buying a package of cupcakes..and condoms. I know, it is an odd combination, but hey, maybe his girlfriend/spouse had a birthday and he was getting the cupcakes for the party and the condoms for...the later evening?
But first, he had to deal with the cashier saying "Cupcakes and condoms? Man I wish I was going to this party!"
The man looked completely mortified. He then completely clammed up, paid quickly, and just sped out of the store. The rest of us in line were aghast at what had just happened.