Tlön, Uqbar, Orbis Tertius

My favourite short story of all times by the genius that was Jorge Luis Borges - in both Spanish and English.

Then Bioy Casares recalled that one of the heresiarchs of Uqbar had declared that mirrors and copulation are abominable, because they increase the number or men.

Tlön, Uqbar, Orbis Tertius.