haha great question.....and sometimes you are scared to push it out....cause it might blow up........good question....hahahah
Using your muscles to push out the urine. Those same muscles push pressure on your intestines and force the gas down your intestines. Or...you're reducing your bladder size which takes pressure off points on your intestines allowing more gas and feces to flow out... Or...I don't know anything about biology...someone grab a medical book.
So do not want to know what you consider number 3... Lucky does though... Be sure to use the SPOILER tag!
Beware as you get older the chances get a lot more riskier, because the fart that you think is coming could be soo much more.
Read the book Fart Without Fear by Soiled McBritches for some valuable info on how to prevent sharting.
Dammnit I have been jinxed. I am having a pee/poop struggle today at work. I refuse to go at work unless I am going all Vesuvius. Gonna be a long day!!
thephins.com needs an email alert to let us know when a sharting and farting thread opens up. I hate getting late to these things.