My inner nerdy side wants to say that venn diagrams aren't histograms; they're abstract depictions of logical relationships. So relative circle size is unrelated to the number of occurrences of a particular event within the data...
+1 (ftfy)
My statement was nerdy already but you just took precision to the nth degree.
Guys, please don't post photos of your crotches and bulges here... If you really want to, please start a separate, dedicated thread. I'm sure you'll get a lot of hits. TIA