I'm wondering if the "mount horses from the left" is why the chain is on the right side of a bike? To keep you away from the chain when pushing the bike or mounting. Anybody know the historical origin?

Another unclipping question: Are there people who unclip while seated and others who unclip while standing on one foot? I always do it standing because my hip/leg/ankle don't turn far enough while seated. The Speedplay pedal directions said to unclip with the pedal forward (3 o'clock) and that would imply sitting.