You won't fall asleep after a cup of coffee. You can always warm coffee up. Coffee comes with endless refills. Coffee is out of your system by tomorrow morning. You can make coffee as sweet as you want.
Coffee smells and tastes good.
You can turn the pot on, leave the room, and it'll be hot when you get back. They have coffee at police stations. You can always ditch a bad cup of coffee. No matter how ugly you are, you can always get a cup of coffee. It doesn't matter.