Many male swimmers shave their legs, armpits and chest hair to glide faster through the water.
It makes them swim a bit faster because the water does not have to go through there hair. That's why people also wear swimming caps.
Lots of athletes shave their legs, especially swimmers.
To reduce drag
Not necessary. Some swimmers shave their legs and entire body for less resistance in the water.
because they can go faster because there is less friction.
Some models shave their arms. Model, swimmers and body builders all tend to shave their arms. It is personal preference unless the photographer asks you to.
Athletes shave their legs to eliminate as much wind or water resistance as possible. Swimmers actually see pretty significant decreases in their time when they shave their bodies.
No, they are slower
They shave their entire body so they can move through the water faster.-Lack of hair has nothing to do with speed for swimmers (or very little). When you shave your body, you are not only removing hair, but the layer of dead skin cells on the top of your skin as well. The idea is to remove all of the gunk and buildup on your skin so that when you enter the water, it feels different. Basically, all of the stimulation gives your body a shot of endorphins when you dive into the pool (kind of like steroids, without the drugs). That is why people swim faster after just shaving.
Either they don't want to get their hair wet or their hair slows them down and they want to swim faster. That's the same reason olympic swimmers shave their arms and legs.