Cops and Heads

I don't think I could be a cop cause I don't wanna be putting my hands on the dude's head as I'm putting him in the squad car. He's a criminal, I doubt his hair is the cleanest thing in the world. And why do they do this anyway? All I ever heard from my mother growing up was "oh, will you just get in the goddam car!?!?!" But a cop, after chasing you down, tackling you and beating you with a stick oh-so-carefully escorts you into the car, delicately making sure your precious head doesn't, god forbid, bump the top of the door. wtf.