Customer: *holding a pair of curtains* “Excuse me, will these curtains fit in my window?”

Me: “I’m not sure Sir. Do you have the measurements of the window with you?”

Customer: *confused* “Measurements? I need to measure the window? How do I do that?”

(I hand the man a leaflet explaining how to measure windows correctly.)

Customer: “Oh, okay. I didn’t realise you had to take measurements. I just guessed it was one size fits all.”