Carmex is the world's second greatest invention.
The condom was clearly the first.
And my deep reasoning for not having Facebook (or Myspace) is that I really don't want people that I used to know in real life contacting me online. My past is my past and I want to leave it in the past. I was a different person then, and the last thing I want is some random person I haven't talked to in five years randomly finding my Facebook and trying to add me.
Even if I used a false name, they'd find me. Because I'd inevitably get friended by my sister, and some of them have her friended, and it's just a stalkery cycle