To people raised in a railroad shack
It is known as your butt crack.
To people who are more verbally deft
It is known as the gluteal cleft.
Either way, it’s at the bottom of your back
Between the one on the right and the one on the left.

Some ladies’ swimwear of slender heft
Displays freely the gluteal cleft.
On this matter, my mind is shut:
Don’t walk around showing off your butt
Please desist at least
Until I am deceased.

Your gluteal cleft, I must insist,
Should be seen by your dermatologist
When treating a rash, or cyst,
And nobody else. No daughter of mine
Wears thongs. That’s the bottom line.