Err, that is...well, let me explain.
There's a lot of information being thrown at us all the time (news, entertainment, advertising, status updates), and a near-constant drive to try to make that information compelling, interesting or just weird enough to stand out from all the rest (think cable news, YouTube videos, all of the people making a living on various forms of marketing, political rhetoric).
It's a bit understandable, then, that in our daily communications we are tempted to exaggerate and embellish things. How else will our commentary about how life-changing this bowl of soup is stand out against all of the other commentary about how earth-shattering that coffee drink is or how vitally important that cute baby animal video is??