When two guys go to the toilet at the same time. One is sitting on the toilet seat in the usual fashion, and the other sits on top of him, facing him, and shits between his legs.
Person 1 : 'Damn, they've only got one toilet here! I'm desperate!'
Person 2 : 'Hey, me too!'
Person 1 : 'Looks like we'll have to do a two man stand, I'll go on top'
Person 2 : 'Fine, just don't shit on my legs again like last time!'