When one spends more time than necessary, clearly violating the fifteen minute maximum rule for being on the toilet, blood flow to the legs is reduced causing numbness. The legs and feet then fall asleep. When finished, walking now becomes quite challenging. The steps taken by the sufferer resemble those taken of people with polio.
Dave, why are you walking so funny?
Spent too long in the crapper,now I've got toilet seat polio.
When a female of questionable reputation has enough space in her vagina to accommodate an entire fist, one then punches the first straight into the vagina whilst shouting "Choo Choo " or making noises resembling a locomotive.
That chick from the bar had enough room in her vag for a locomotive to do donuts, so I pulled the conductor off.