After seeing the UMP-Teenth thread of the "realtionship of XXX to Penis size" I just felt the need to say what my Statistics Professor said in your first research class. Correlation does NOT mean causation. Two things can be highly correlated (meaning they occur together in high frequency) and that may not mean that one causes the other. Brown skin and brown eyes. Red hair and freckles. Proving a causal relationship between two things that have a high level of correaltion is MUCH more difficult. Years of sun exposure and skin cancer. Year of smoking and lung cancer. As we examine all these numerous "stuides" please take a minute to remember this. Most of what is reported is BUNK.