Dark Spelling Question

This is a pun. The letter 'C' sounds like the word 'see'. The punchline plays on the idea that orphans can't see their parents, thus the joke uses the letter 'K' in the word 'dark' instead of 'C'. It's a bit dark humor.

• Parent
• Letter
• Orphan
• Darkness
• Family
• Word

• What’s the difference between orphans and blind children? None. Neither can see their parents.
• Wanna see something dark? Close your eyes.
• What is a blind person's favorite color? Black.
• What is it called when you hit your funny bone at night? Dark humor.