International travel is like a huge slumber party. You're in a large plane with 200 people who are talking, watching movies together, eating together, and sleeping VERY close to each other. Except it's worse than a slumber party. It's kinda gross if you think about it; sometimes you're spending like 10 hours with these people, some of whom have not showered or brushed their teeth in who knows how long.
So then, you would think that the immigration line at the airport would go much faster but no, they are painfully slow. Why do those officers want to spend that much time talking with people who haven't brushed their teeth and have bed hair and rings under their eyes?