and you thought he was joking

It's called the totalitarian principle;

Everything not forbidden is compulsory.

we have a democratic government, not a totalitarian one

Your point? It's a slippery slope anyways.

homosexuality isn't mandatory, either, and it probably never will be
a lot of people are still homophobic and forcing homosexuality onto people is just as unethical as forcing heterosexuality onto people

it's not mandatory, you can be straight, or gay, or bi, or ace
i can't believe it took until 1991 though