You need to go to the loo, but decide to wait 'til you get home.The exponential desperation that I am talking about is, what I call - the Toilet Bowl Effect.
All's fine and dandy, right until you reach your stop.
Suddenly, it all starts to get desperate - the desperation increases exponentially as you approach your house.
You're just about explode as you fumble about with your keys; thanking God you're actually at your door.
You open the door, run towards the one-and-only-toilet in your house, and - your housemate is on the dunny.
Current real-life example of this, is my plaster cast. I managed quite incredibly well, having my arm first in a back-splint for 2 weeks, then in a plaster cast for 2.5 weeks. But now, with only 2 days left to go before I will (hopefully) have my cast removed (fingers crossed), the Toilet Bowl Effect is oh-so-real and true. The itch is suddenly killing me; it's feeling incredibly hot; I have sudden impulsive urges to slam it against a concrete block to get it off.