How do people ride road bikes without fenders? I want to buy a bike. The road bikes look very gorgeous. However I noticed that they come without fenders to protect from water! I was really surprised for that actually and that made me wonder about how do people protect themselves when driving on wet roads. 

When one drives on a wet road then you get smashed by water and your clothes get dirty. So how do people protect themselves when driving a road bike?! Are the tires somehow made that they prevent water? Or what is the secret?!
Most road bikes are the equivalent of an open-top racing car. You just don't ride them in the rain. And if you do, you are expected to be hard core enough that a little rain isn't worth the weight and aerodynamic drag that the fenders would cause. And there's also a reason that hardcore racers wear sunglasses during the day or transparent glasses in the evening -- they help keep bugs and rain out of your eyes. And as many people note, you'll be soaking wet from sweat anyway if you're riding hard.

That being said, there are some slim fenders that can attach to some road bikes -- although many/most road bikes currently being sold come without fender eyelets and are so aerodynamic that there isn't enough space between the wheel and forks/stays to put a fender that would work a darn. If you want fenders but like the road bike drop-bar style, look at expedition/touring bikes or cyclocross bikes. 

Or, if you're like many people, you instead have a beater commuter with fenders that you ride in the rain and you keep your gorgeous carbon fiber racer for sunny days. One can never have too many bikes.