Now that I look at it, I see why.
Joke Explained
This joke is funny because it sets up an expectation that “icy” is an easy word to spell, but the punchline humorously subverts that expectation by suggesting that the reason it’s easy to spell is that it is just “I C Y” – a simple three-letter word. The humor lies in the double meaning of the word “icy.”
On one hand, the setup leads us to believe that “icy” might have some unique or straightforward spelling characteristic that makes it easy to remember and spell. However, the punchline reveals that “icy” is easy to spell because it’s just composed of three basic letters, “I,” “C,” and “Y.”
The humor comes from the clever twist in interpretation, turning a seemingly straightforward explanation into a witty play on words. This type of wordplay often creates a light-hearted and unexpected punchline, making the joke funny and enjoyable for those who appreciate clever linguistic humor.