Having a friend sleep over when you were 10: Omfg let's stay up until 4 am and prank call people and watch movies and gossip about everyone from our school and go on a sugar high omfg we're so cool
Having a friend sleep over when you're a teenager: Shut the f.uck up when I'm trying to sleep. If I hear you breath one more time I will f.ucking end your existence. Seriously, do you want to f.ucking sleep outside.