Sphincter Sense 

The anuses uncanny ability to sense when a toilet is near by. This is most apparent when embarking on a long trip home, knowing that you need to poo. The sphincter will not let the poo crown until you are seconds away from a toilet, saving you from ruining your pants.

"I'm positive there is a toilet nearby, my sphincter senses are tingling!"

Sphincter Sense by Catatafish22 September 13, 2011