PZ does it again.  This time he covers the effect of porn on male fertility, and this is not just a peak at the seedy underbelly of human sexual research.  There’s interesting information here if you want to know how to increase sperm count, motility, and overall virility.  You definitely need to read his entire analysis for the full effect, including the impact of such things as wearing a cell phone on the hip or carrying it in a pocket, coffee, how often porn is viewed, how explicit the porn is, and even the impact of having men in your porn.  Entertaining as always, and quite enlightening as well.