I saw one of these "sad pony" pics in 2012. It had "to be a rock and not to roll" written on it, and that was how I found Led Zeppelin's "Stairway to Heaven."
You jest, but when the moment comes when you notice you suddenly can't (can happen with certain conditions), you pray to all the gods you can think of just to be able to take a leak again.
Yep one should be grateful for every time one can relieve oneself without pain.
On that note if at the moment you are reading this dear reader and you can breathe comfortably: Think of all the times you couldn't when you had a cold or similar and celebrate your health.