I wonder whether there is another mechanism at play. Often when I have conversations with friends, it's likely that either I or they search a term, or have done

I wonder whether there is another mechanism at play. Often when I have conversations with friends, it's likely that either I or they search a term, or have done so recently. Couple that with the social graph and location tracking, and it's very easy for Facebook/Google to target an ad knowing when I interacted with another person and assume that I may have interest in the term that was recently searched by them.