Last weekend I went clothes shopping with a friend in Dublin. He found a shirt he liked but all the trousers were wrong in some way so we went and had coffee instead.
On the way home I commented:
I don't understand why none of those trousers fit you right because you wear M&S trousers all the time.
He studied me a moment perplexed.
We were in Dunnes not M&S.
Puzzle solved so!