If you want the proper answer, when starting the show one of the animators decided to make the Simpsons yellow as its the colour that would grab people's attention as they were flicking through channels. A bright eye-catching colour which makes the characters look like nothing else out there, I think they made the right choice.
I have one question: Bob,do you like the BORT pairing?
Sure! This one should be interesting to answer
I love his expression! You're getting better at them - honestly!
Really? Aww thanks so much sis, it means loads