An eye-dea.
I can't take credit, because this joke was created by a computer (The STANDUP system). Below is the link to the Wikipedia page about computational humor, and a few more (albeit bad) jokes.
https://en.m.wikipedia.org/wiki/Computational_humor
Many of the jokes are contributions from our users. If you find anything offensive and against our policy please report it here with a link to the page. We will do everything to make this an enjoyable platform for everyone.