And don't forget this

Since you asked:

As I am a professional - cough - comedy writer, I took it upon myself today to take some time and analyze my jokes today. They fell into different categories from cultural commentary down to bawdy observations and back up to satiric political comments.

Another distinction they fell into was ironic, sardonic and sarcastic. These are concepts that I have struggled to define and distinguish for a long time. It finally comes down to this, I think.

Naming a boy Curly and having him grow up to be bald is ironic.

Saying to a bald person named Curly, "Curly isn't so curly." is sardonic.

And nicknaming a bald guy Curly is flat out sarcastic.