Not just that, but the body positions were weird. Like having the mouth on the ground with the arms high in the air. I guess it’s doing yoga.
Here’s a charming rendition by Bob McGrath (in his pre-Sesame Street days) on Sing Along with Mitch:
Kilmer was only 31 when he died in World War I, killed by a sniper’s bullet. He “enlisted in the New York National Guard in 1917 when the United States entered World War I. As a family man [and father of 4 kids], he was not required to join the services. Instead, he requested—and received—a transfer to the infantry and was deployed to Europe.”
Joyce Kilmer | Poetry Foundation
Apologies, but I can’t think of this poem without thinking of this.
I think that I have never bit
A thing as lovely as a tit
A tit whose taste is just as sweet
When properly addressed as ‘teat’
I know this poem’s a piece of shit
But only God can make a tit
I don’t remember where that came from.
I… can’t…even.
Good grief.
Zack Weinersmith wrote this ironic commentary about the hypocrisy of printing the poem on paper:
I think that I shall never see
A poem as lovely as a tree.
Except for this one’s sweet refrains;
Let’s print them on a tree’s remains.
“Dirty Duck” cartoon from National Lampoon magazine 1980-something.
Thanks! That’s it!
I’m so embarrassed. 
You should be.
I have .pdf files of National Lampoon from April 1970 through (at least) October 1994. Do you happen to recall which 1980s issue?
If you’re interested in bad verse, you should try William McGonagall
Try February, 1979. If that’s not it, I can’t help you further as I sold my stack of NatLamps a dozen years ago.
I downloaded them over a decade ago, but haven’t had time to read them. Dirty Duck is in the February 1979 issue, but the poem isn’t in it.
John Bagley’s San Francisco-based Company & Sons published The Dirty Duck Book #1 in December 1971.
Shortly afterwards, London was contacted by the publishers of National Lampoon, where Dirty Duck ran monthly for several years alongside the work of London’s wife Shary Flenniken, who was drawing Trots and Bonnie for them. London moved the strip to Playboy magazine around 1976, where it ran until 1987.[3] Dirty Duck later returned to Playboy and continues to run there as of 2011.
I checked a few other issues and didn’t see it in the table of contents. Maybe I saw it in an illicit Playboy.