Nudity linked to hearing loss?

My students are curious about the world, and I'm asked many intriguing science questions. One of them recently was, "Is it true that you loose 68 percent of your hearing while naked?" After a bit of searching, the only document in support of this unlikely hypothesis is ad from the United Health Foundation. Link (pdf).

While we're talking about myths, I might as well try to clear up the "Southern Hemisphere Toilet Flush Direction" question. Here it is: There is an effect, the Coriolis effect, that causes the Earth's atmosphere and oceans to turn a certain direction. But, the effect on the water in your toilet is to small to matter. A full explanation has been published in Scientific American magazine, and many, many other sources. Link.