Hey, this is fun! Go to Google (http://www.google.com) and click on the "play" icon ...
... and you get this neat Venn diagram generator.
It's a tribute to John Venn, the diagram's creator, born today in 1834. (Incidentally, I disagree with the linked Guardian piece's assertion that the doctor/prostitute/TSA diagram is problematic. You just have to read "doctors" and "prostitutes" to mean "qualities of doctors," "qualities of prostitutes," etc. It's also been 15 years since I took a math class, so my opinion is worth what you paid for it.)
Bonus! Click here for a picture of a stained-glass Venn diagram in Cambridge, England.