You never feel compelled to stop a friend from getting laid. You don't give a rat's ass if someone notices your new haircut. The world is your urinal. Hot wax never comes near your pubic area. You never have to drive to another gas station because this one's just too icky.
Wrinkles add character.
You don't have to leave the room to make emergency crotch adjustments. If you retain water, it's in a canteen. People never glance at your chest when you're talking to them. New shoes don't cut, blister, or mangle your feet. Porn movies are designed with you in mind.