I have the sense of humor of a twelve year old boy. Farts, poop, burps–anything gross and juvenile will set me off. Any time I see a Ford commercial, as soon as they mention “super-duty” I am snickering.
Recently in my library adventures I came across discovered a book with the phrase “three magic balls” in the title, and I nearly lost it. Needless to say, it got weeded (for many other reasons besides the balls, but the balls were funniest reason).