I stumbled across this site, weirdfragrances.com (I'm not linking directly to them, so I won't boost their google rank), that promises to send you a free sample of cologne. In return you simply provide them with your email and mailing address, and promise to later answer a few questions about the fragrance. You can choose from a variety of offbeat scents such as Grease Monkey, Burning Rubber, or Ash Tray.
Is it a legit offer? I would guess not.
First, it strikes me as odd that the site is registered anonymously through domains by proxy. Why would a legitimate company be trying to hide their identity?
Second, a quick google search reveals people posting on forums about how they submitted their info but never received anything except spam. So it appears to be a spam trap.