It's funny because it's true.
Reviews for "When Peeing"
looks like someone has prostate problems
You did say in the comments that you were trying things out instead of making a full story-based flash. The humor involving the character interactions was middle of the road, compared to some of your previous shorts. What made this flash work for me was the shaking sound effects. Those will pop into my head for a very long time after viewing this flash. That is humor that works, as I'll be laughing about it a month from now.
Great!
It's funny cuz it's true. Sadly.