Independent minds always find a way to express themselves. In twelfth and thirteenth century western Europe, there were the Goliards.
The "Confessio Goliae" is a famous secular poem from this age, by an anonymous Goliard, the Archipoeta. Cleverly shaped as a fake confession, it's a playful and sharp-tongued masterpiece. Only recently have musicologists succeeded at reconstructing the melody it was sung to.