The post in question does mention Izal medicated toilet paper but no poem. Being a lover of poetry I thought I would Google “izal medicated toilet paper poem” to see what came up, and it turns out that during the war Izal employed a poet to pen morale boosting poems in a bid I guess to shit for victory. Here is one such poem that was printed on Izal toilet paper:
Hitler now screams with impatienceStirring stuff eh?
Our good health is proving a strain
May he and his Axis relations
Soon find them right down the drain