I was just on a wander around YouTube looking at electricity and magnetism videos and the ad below popped up. I -- rather obviously -- am not a Mt. Holyoke graduate. But ashacat is. She watched one Mt. Holyoke video while I was signed on. Apparently Google's advertising algorithms are keen enough to suss out that if you're willing to watch the entirety of the Mt. Holyoke Reunion 2013 video, you must be a graduate. That's creepy.