There was a young lady from Wheeling
Who had a peculiar feeling.
She laid on her back
And opened her crack
And peed all over the ceiling.
(And then she farted)
That was both grossly descriptive and informative 
I think it’s evolutionary. We always have a fart on Alert-5, ready to launch at any moment, so when we are at our most vulnerable while peeing, we automatically fire that bastard into the sky to keep you safe from bogeys.
Do zombies fart while peeing?
Do zombies pee at all?
Assuming they’re dead, then they’ve already farted their last fart, and likely shat their last shit.
Their digestive system won’t process anymore, although they may bloat. Eventually whatever they eat should distend their bellies enough that it ruptures and all food just goes right out the front.
So… they don’t pee. They may make gassy releases but they’re not farting in the conventional sense.
[nitpick]
“She lay on her back.”
“Lay” is past tense of “lie,” OR
The present tense of a verb with an object, eg “I lay it down.”
With your use, someone would’ve had to have laid her down, or a form of “to be” and would need to be mentioned.
Excursus:
The ambiguity has caused centuries of inappropriate amusement whenever the justly famous and deeply moving soprano aria known as “When I Am Laid” is mentioned. It is from the opera Dido and Aeneas by Henry Purcell. Ordinarily, an aria from an opera is referred to by citing its first words, usually to the first verb. The full phrase is “When I am laid in Earth,” which is the way it’s sometimes referred to, to avoid the dirty pun. The aria’s common name is “Dido’s Lament.”
[/nitpick]
I fart in the bathroom (which might be while peeing) in order not to fart in the office, bedroom, etc…
It’s a little know fact that weary after penning the 2nd law of motion, Newton had to pee and then farted, thus promulgating the 3rd.
Not really.
Sure it is a zombie but this deserves a small correction - Branches of the pudendal nerve control both the anal and urinary sphincter. The process of simultanously contracting the bladder or the rectum, most often inclusive of increasing intra-abdominal pressure, while sending the signal to relax one or the other sphincter, often has cross talk to some degree.
On the peds side we see the converse - kids with dysfunctional voiding of the bladder (which can show up as wetting or as urinary tract infections) are also commonly constipated - that is also have dysfunctional rectal emptying. One not getting coordinated well usually results in the other being klutzy too and treating one requires addressing the other if present. (Other issues come into play as well but are not pertinent to this thread.)
Why do women fart after they pee?
They cant shake it so they gotta blow dry…
Sorry guys, I’m delurking after 15 some-odd years of reading this board. I simply could not resist.
One wonders if, in the intervening years since this question was asked, anyone wanted to know why some people pee when they fart.