"Ad Sense" is based on browser habits and statistical human traits. Some are of sites people visit and some are guesses of the pimple face tech nerd at Google thinks you might like...for a better way of putting it...they go fishing with ads that have no "ad sense" based on your personal habits. Google is getting a lot of crap for this behavior but the stock keeps rising and they keep making more money.
The best browsers for stopping this are Apple based products such as Safari and even Firefox.
Chrome is a google product. Duh
Cheers,
DL
