There is a reason that many countries around the world (including mine, thankfully) have laws requiring seatbelts to be worn: China, Russia, Australia, EU, UK, United States (WHAT THE FUCK ARE YOU WAITING FOR, NEW HAMPSHIRE??!). They save lives. Unless I'm moving my car from one position in my driveway to another position in my driveway, I put it on (and even then I usually automatically reach for it). I have to consciously try NOT to put it on. It takes 4 seconds and it doesn't hurt, although it may hamper your ability to get your cell phone that you accidentally dropped while you were texting while driving. That's a whole other rant I'll get into some other time.
Three friends were coming back from a party at 1 AM. The driver was a bit tipsy, the other two were flat-out drunk. The driver and the front seat passenger were wearing their seatbelts when the driver lost control and flipped the car several times. The rear-seat passenger wasn't. The driver walked away with scratches and the passenger had a few broken ribs and a broken sternum. He went home in a few days. The rear-seat passenger wasn't wearing his seatbelt. For comparison, here is what a relatively normal cervical spine looks like: