[dogfood]

A kid goes off to take his first guitar lesson. When he returns his father asks him what he learned.
Kid says "Today I learned a c chord"
Next week he returns from the lesson and his father asks him what he learned.
Kid says "Today I learned a g chord"
Next week he returns from the lesson and his father again asks him what he learned.
Kid says "Nothing. I didn't go to the lesson today"
Father asks him why.
Kid says "I had a gig".

[relient nelson]

My favored version of this joke involves bass lessons

[Jonodude]

I'd have thought he would need to know at least D, but whatever.