I'll also add other things that make me laugh starting with each letter.
Letter B is for Bears, which seems to be a fairly common theme with me.
Other things that start with B that make me laugh:
B is a reminder to always find the right Balance in life.
B for not removing your Balls from this particular golf course.
B for one of my favorite shows, The Big Bang Theory.
B for this guy's missing bike.
B for all my fellow bomb defusers.
B is for Brothers, whether you can make money off them or not.
B is for the Bad decisions we make, and how much fun they are often are. :)