Oh... and underware protect your package from being exposed in the event that you rip (or lose) your pants,they also protect your pants...from the ass that you didnt wipe well enough.
...And EVERYONE knows that you are sposed to put on clean ones in case you get hit by a car.
Oh.. one last thing...I can see the head of your pecker through your Khakis,That may.. or may not be what you had planned.