Duality jokes

Roses are red.

Violets are blue.

I have schizophrenia,

And so do I.

Genders are like the twin towers. There used to be two of them, and now it’s a sensitive subject.

What do the twin towers and genders have in common? There used to be two, now they're a sensitive topic.

The twin towers are like genders, there used to be two of them.

The Twin Towers and genders have a lot in common. There used to be two, and now it's just a touchy subject.

What do the Twin Towers and gender have in common? There used to be two of them, but now it's a sensitive topic.