Here's a thought...#3

"In a lifetime, the kidneys clean more than 1 million gallons of water, enough to fill a small lake."

                                                               -http://facts.randomhistory.com

And yet they can't wait until class is over to empty out. Thanks Kidney's (sarcasm implied). just know I only need one of you- who ever slacks off more will be donated to a community college.

 (Wish I could say the same about my socks)

Thought this picture would be a better representation than an actual kidney- not that I'm squeamish or anything...

Via