They also cause impotence due to extra pressure on the perineum from the skinny seat and bent over posture. It's much better from your manly bits to be in an upright position. Much less pressure on the nerves and blood vessels supplying those vital areas.
I never liked the old "ten speed" or racing bikes. Maybe it's because I'm older now, but I'm much happier on a "comfort" or "cruiser" bike. It's easier on my carpal tunnel wrists as well.