Adult Chicken Pox Anyone?

I have the distinct pleasure (of the masochistic kind) of having a friend visit me with "Adult Chicken Pox" at work today. Yes that's what they call Herpes Zoster now to avoid being associated with the virus of the toilet seat variety. I must say, I was actually torn between giving him a Mother Teresa hug and just plainly smothering him with a man-portable anti- armor rocket launcher.

My question is: Do we get Chicken Pox from eating too much chicken? Or for that matter, can adults get it from using toilet seats in public restrooms?

Then lastly, should I now ever talk to my friend again for spreading virus in my workstation? Or is this really just a part of some labyrinthine Al- Qaeda plot?