The hole in your butt, called the anus, is there, primarily, for excretory purposes. At the end of the large intestine lies the rectum. By the time food gets to the rectum, it has already been digested and turned into fecal matter (poop). The anus is there so you can get rid of the fecal matter via defecation (pooping). A few organisms only have mouth holes, so everything goes in and comes out the same hole. Thankfully, humans have a hole designated to each task, so we don't have to defecate from our mouths.
butt hole butt hole
butt hole
A chicken "butt hole" is called a vent or a cloaca.
A *bung hole is the hole in a barrel of wine/whiskey, not a butt hole. I'm not sure if the two are related as far as origins.
Cuz there's a worm in your butt.
your butt hole
butt hole
Butt hole
Your butt hole
up your butt hole
100
with your butt hole