usually you would not connect the pins directly to each other, but put something in between, like switches, resistors, potentiometers and so on.
If you want to read a switch, you would connect an i/o (i) pin to 5V but with a pull down (or up) resistor.
But it's really a bad idea to connect the + 5 volt pin to the ground pins. It's also a bad idea to try to source more than 40mA from any pin on the board by for instance trying to run a DC motor or relay directly from a pin.
If you are very new to Arduino and electronics i general Lady Ada's tutorials come higly recomended.