Sorry, I still don't follow
Is 'air or water' a VW/GTI/car nerd metaphor for something? (I hope so, 'cos I'd look a bit crap if it was something obvious — which it probably is). You're talking about
my personal site?
EDIT: I understand now, on my 'about' page: "Do we breathe air or water?" That's supposed to be a spambot filter — questions that humans but not spambots can answer, so only humans will contact me through my site. There should be an empty text field right next to it to type in the answer.