Because it messes with their hops
Because it's made of hops.
They both have hops.
It was an oakcident.
Not enough cement EDIT: Okay thanks for pointing out that I messed up the wording but the joke is supposed to be the funny part
Bugs Bunny.
A berry bubbly bunny.
None, the beer should be open by the time she has brought it to you.
Just Beer. If you don't get it, think mathematically.