Scorpio guys, how do you want a hot girl you barely know to start chatting with you on facebook?

[cutiepie loves all hot guys]

I need to start a chat with this hot scorpio guy. He barely knows me we were in one class together but that's it, but we are friends on facebook.

Here are the ideas I had:
Say "hey" first, then wait for his reply, then if his reply is something like "do I know you" or "hey??" then I could just say either of these things:

1. Oh sorry wrong person! It looks like the other person just went offline
and then continue the convo with him saying something like "hey you go to ____ high school right?" and continue
2. say that my friend dared me to chat with the last person on my chat list (which will be him cuz he is always the last person)
3. argh idk, i think the first idea is pretty good.
Any other suggestions?