The greatest shit of your life. Clenching you cheeks on the way to the toilet, praying you make it on time. When those sweet buns finally touch the seat an overwhelming feeling of pride and relief overcomes you and one cant help but squeel in satisfaction.
Mike: dude i heard some pretty wierd noises coming from the bathroom.
Chris: oh i was having a buttgasm
Mike: you know how i know you're gay?