Another problem is whatever you sing, someone will relate it to this song or that and if you sat them side by side they would be distinctly different. The recognition might be words, riffs &/or subject matter.

But in their mind .................

I always refer back to my song about dog poo. There is one about "Emptying dogs out down our street"

But when I sing mine about "Pure Finding" they think I am being derivative, or wasting my time doing the same subject. The fact that the song is a humorous take on the Victorian trade of collecting poo and selling it is a nuance lost on some "Folkies" (of all people). Despite a pre-amble to set out the scenario. And an educational aspect in many cases.

FWIW it was still used in the 1950's, now largely replaced by bird guano. Which itself is still used in Morocco to soften leather after tanning & dyeing. Keeping pigeons for the purpose is an income stream.