Okay... 3 days back on a bike and my err... "undercarriage" is sore as all get out. I did some looking on line to see what I could find out... So... What the heck are your "sit bones"? and how do I know if I am on them? Also... how many pairs of biking shorts do you guys own? I know you are only supposed to wear them once... holy hell... and could the pain be from not sitting on a bike saddle for many years?