Because if they didn't they'd fall over.
Follow the slime trail.
When you wake up in the morning with an erection so stiff, that when you bend it down to take a leak, your legs kick back and you hit your head on the toilet.
Because he fell asleep on duty.
She thought to yell for help, but her husband was nowhere around to grant her permission to do so.
Me: Out. I can't stand being hemmed in by four walls. Wife: How many walls has the pub got Five
Because it is two-tired (too tired).
If it didn't stand on any, it would fall over.
