A Lurker In The Men's Room

As I was sitting on the pot
I felt a pair of eyes;
I took a glance out through the slot
And much to my surprise,
There was a patch of blue out there
I'd never seen before.
I couldn't make out head or hair
Or shoes upon the floor,
But I could see (about chest high)
What seemed to be a shirt.
There's someone waiting just outside
Which served to disconcert!
I guessed he must have had to go
(Of that, I could relate)
But standing just outside the door
Is not the place to wait.
I wished he'd take a few steps back;
My irritation grew.
Had he no proper sense of tact?
There's some things you don't do!
And so I flushed, with half a mind
To chide him for this gaffe.
I opened up the door to find...
Oh no! I had to laugh.
When I emerged, there was no trace
Of a man with urgent bowels;
The blue was from the plastic case
Dispensing paper towels.