If you've been around your friends smoking, you've likely had a contact high. I wonder if there are any studies on contact highs... But if you really want to try it out, just take a small hit with one of your best friends. Be in an environment you trust, and just remind yourself that you're on a substance that is making you think differently. There isn't a whole lot to be scared of when it comes to a little bit of weed. The first time can be scary for some, but the whole experience doesn't last too long anyway. Just be smart and you'll have a great time.