Bizarre Bathroom Habits

Having been to my requisite share of men's rooms I've seen my share of cartoon anatomy and pithy sayings like "If you can pee above this line the fire department is looking for you". What I haven't seen however is a water cup sitting next to a half used roll of toilet paper above the commode. Now I have questions.

It's a disposable paper cup so why didn't the person just throw their refuse away? I mean, the garbage can is literally 5 feet from where he left it. Was he a dedicated environmentalist who was planning to reuse the cup on return visits? Was the cup for overflow? Was he creating a makeshift bidet?

These are the questions that enter my head (admittedly a disturbing place) whenever I see something where it shouldn't be.

You're welcome.