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Bicycle, scooter, motor cycle has a seat, but they can not seat on him self. And they always run not walk.
The seat of the bicycle is at the backside and not in front because it it easier to ride it and takes less effort from this point.
A banana seat is an elongated seat on a lowrider bicycle, which curves upwards at the rear.
A female bicycle have bigger seat than the male bicycle. That's how you know the difference.
A bicycle seat is typically called a saddle.