Bathmat Confusion

I was first into the shower, and there was a white towel hanging over the rail. Which I used.

Then a little while later, after G. took his shower, he came out holding this towel, and asked: "Did you use this to dry yourself?"

"Yeah..?"

"It's not a towel."

"What is it?"

"It's a bathmat. You put it on the floor to absorb the water."

"Oh."

I guess the guesthouse was posher than I was. (And I have a horrifying feeling that I made the same cock-up at Conception).