Considering I’ve snapped literally thousands upon thousands of digital photos of my son since his birth, it dawned on me recently that nearly eight months into his life, I didn’t have even a single picture of his behind!
Even worse, I realized I probably didn’t really even know what his butt looked like! Now this might sound like hyperbole, but it’s not.
Literally, if you’d shown me a series of mug shots of the derrieres of five or six similarly-toned babies, I absolutely would not have been able to pick Zin’s posterior out of the lineup if my life depended on it. Looking back, I don’t think I’ve spent more than a combined 17 seconds looking at his cherubic (other) cheeks.
Now, you may be thinking, “Seriously? What kind of a negligent parent is this guy?” And, “Does he bathe his child?”
And my relatively respectful replies would be: “Actually I’m quite involved in my son’s life.” and “Yes I’ve done so dozens of times, and frankly I resent the accusation.”
In all fairness, my lack of familiarity with my boy’s tuchus shouldn’t be that surprising. After all, during bath time and any other brief occasions in which little Zin is naked before me, I’ve not exactly been eager to have him remain in that state — at least not with his poop chute facing anywhere near my direction.
Most other jumpy new parents who’ve been pooped upon will concur with me on this point. There are few things more terrifying than when your infant passes gas in his birthday suit while in this literally rear-facing position. This type of “Baby Bum Russian Roulette” can leave scars on a sleep-deprived daddy because you never know when there’s more than just air shooting out of that chamber at your face, hand, etc.!
Thankfully, at this point in his development, Zin has calmed down with the projectile peeing and pooping during his rare moments of exposure, so lately I’ve been less cautious. Plus, I’ve essentially no choice but to be exposed to more frequent views of my son’s bottom these days because his current favorite game appears to be spinning rapidly mid-diaper change a la “hungry crocodile death roll vs. wildebeest.” But a tad do I digress.
Like the rest of his body, the kid’s backside — precious as it is — has practically quadrupled in size since his birth. So that’s another reason you can’t blame me for not recognizing it since those early days of his life.
Excuses aside, when I took this photo below, I was astonished by the aesthetic length of his intergluteal cleft [which is the biomedical term for what most of us so crudely refer to as our “butt crack” — Now, don’t tell me you never learn anything from this blog] relative to the size of his baby body.

Proud papa that I was, finally gazing upon his ironically picturesque tush for essentially the first time, I thought to myself, “That there is an impressive vertical gluteal crease!”
Which had me wondering: “Are all babies’ buttocks like Zin’s? Is the typical infant intergluteal cleft similar to the human eyeball in newborns?”
That is, are we essentially born with the same size eyeballs and “fanny slots” that we carry with us throughout our lives? [Actually, the eyeball thing might be a myth, so I’ll have to check it out with Mommy Science PhD]. Either way, why hasn’t our pediatrician measured it to inform us under what percentile our child falls? I know I might be biased (see #2 at this blog post here), but I’m fairly certain Zin has an above average rump ratio.
Anyway, if this blog entry’s great biological inquiry inspires any undergraduate or graduate degree theses, please make sure you give the LIFEwithZin Blog a shout-out in the Acknowledgments! ;)
-DaddyDom @lifewithzin
*Note: Please do yourself a big, big favor. Do NOT, under any circumstances, make the mistake that I did during the composition of this blog post, which was to naively perform a Google images search on the term “intergluteal cleft,” looking for a biology textbook-style drawing slightly larger than this one at a “Yahoo Answers” post. You are not likely to be able to “un-see” the horrifying, visual barrage of thumbnail .jpeg’s from medical websites of this region of the body [the experience proves definitively to Daddy (Political)Science PhD that it doesn’t, in fact, always pay to fact-check]. Seriously, I don’t think I’ve ever hit the “Back” button faster than I just did on my browser, yet I don’t expect the resulting nightmares to end anytime soon. Ugh. If you don’t heed this advice, don’t say I didn’t warn you.
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