Behind, After, Back, Later
If you loiter around to poop in winter you never know what could be happening behind you. After you're done you could turn back to see something really crazy that you missed because you took so long to poop in the cold.
Imagine trying to loiter while you poop in the winter. You're just trying to take your time as you squat over the snow, but soon you hear things behind you.
ご, こう
うし, あと, のち
None
You finally look behind you and see Godzilla (ご) and a giant こういち having a violent battle back there!
Godzilla and こういち were going at it behind you the entire time you were just lazily taking a poop in the snow?! Ahh, that's so embarrassing! And also dangerous, they could have crushed you! You should look behind you more.