Originally Posted by Loose Chain

In stocking feet or bare footed, no cloths but thin undies (or actual, no pad cycling shorts), stand back to a wall on a tile or wood floor (no carpet) and have a buddy shove a hard cover book with a one inch spine up into your crotch until your feet go light and it starts to hurt. Put a mark on the wall at the top of the book spine. Do this three times and average.