These are great!

I seem to get asked stupid questions every time I'm at work, but they mostly all blend together. I work as a bicycle mechanic in a shop which only does service/repair, doesn't sell bikes...at least twice every day someone will come in and ask "do you sell bikes?" despite the big sign above the door that says Repair Centre.

Every Bank Holiday Monday I will answer the phone to someone whos asks " Oh, are you open today?". Every time I bite back "No, I'm answering the phone for the good of my health".

My all-time favourite was the posh elderly lady who came in while I was in the middle of cleaning out a dirty hub or something and said "my, haven't you got dirty hands" in a surprised tone of voice...