Pigeon holing sounds dirty, like cornholing, which is in fact only beanbag toss. Who would put a pigeon in a hole? & why? What is a pigeon hole? When did the pigeon go into the hole? Did it want to? Is it still there?
Is "hole" a dirty word, is that it? Ace in the hole, to buttonhole someone, burn a hole in one's pocket, watering hole, hole in the wall, hole in one.... Nope, they're all OK.
Little red rooster, they treat him nice
He ain't laid an egg in all his life
I'm going away somewhere before long