Based on a trick from the unreleased Penn and Teller game "Smoke and Mirrors" for the Sega CD.
Method for sending to a friend:
Fill out your friend's birthday in the drop down menu below, and hit "produce link". Then email your friend the link. The link will be (secretly) personalised using his/her birthday.
Make sure to include some spiel to make it look like a well cirulated internet meme, and less like something you have made up. Something like this should work pretty well, but you can adapt it as you see fit:
Hi <name>,
Have you seen this web site? I used to be skeptical about star signs but this really works! It asks you a few questions about your personality and nature, and checks it against a scientifically prepared table of star sign traits. Check it out:
<link>
Be sure to send this on to everyone you know after you try it.
Obviously, you need to put the person's name in, and put their personalised link in place of <link>.
Have fun!