Why They Made Parking Lines ?

The answer for this question is very simple and everyone knows why they made parking lines. The idea is to park between the two lines by keeping a little bit space for the car next to you so you both can open the doors, exit and enter your car without struggling.

Now if you don't know how to park properly, why in the world you decide to park in reverse ?

Don't blame anyone except yourself when you see marks of a cat fight on your door next time buddy.