Trust breeds betrayal. People can smile behind their teeth, and it's a dog eat dog world; some people have bigger teeth than you do. So, don't go trusting people so easily 'cause they appear to be "nice" people.
#3) My favorite One Direction song is Little Things. I adore it because of how sweet it is. And not to mention I have about everything they talk about "I know you've never loved the crinkles by your eyes when you smile, etc."