Some grapes are considered sour instead of sweet, but I get your point, not the first choice I would go with either.
Why so sour?
ME SO SOUR!
Me sour you long time.
Weird choice to use purple as the butt of the joke and not a more sour one like yellow.
Some grapes are considered sour instead of sweet, but I get your point, not the first choice I would go with either.