Why didn't he tell me?

I cleaned my back legs and my bum this morning. I then wandered around, indoors.

I looked at a wall for a bit.

I jumped onto a chair.

I sniffed the floor.

I even had a wee outside.

A little later on, I was sitting on a window sill, looking at my territory.
Suddenly, I saw my reflection in the window. My tongue was poking out. The last time I'd used it was when cleaning my back legs. This means my tongue had been sticking out for ages. Why didn't my human let me know? Idiot.