It's the gay spray in cities making you want to go to the mens room to get anally raped by a gay.

There are nerves in your digestive tract called the pelvic splanchnic ganglion that are sensitive to the frequency of toilets. The closer you get to a toilet the more you feel the urge to go. There is a much higher concentration of toilets in the city than in the country so the power level of the toilet frequency is much more intense.