Whilst at university, I lived with a man who had a habit of going to the loo - the long trips, shall we say, rather than the short jaunts - with the light off, and leaving the door ever so slightly ajar.

Once, I walked in on him, and in embarrassment said

“Oh, gosh, sorry”

to which his voice was heard echoing from the bathroom as I hastily shut the door

“No, don’t worry, it’s OK”

I never figured out whether it was just a linguistic twist or not.

I sort of hope it was.