Does Amazon know something I don't know?

     So I got this email today and it's really making me question myself, my choices, and my online history/profile/footprint. What in the world have I been searching up that would lead to a random suggestion such as this? Lately on Amazon all I've purchased  has been health or book related. I bought a Fitbit wristband that tracks my steps, sleep, etc, and I'm waiting for a scale that should be here tomorrow.  I bought  a bunch of books for class, and just leisure reads as well.  So this is why i'm really confused by the email I received, but I got a good laugh out of it as well.  Besides that, I love Amazon. I don't like shopping out in public much, so Amazon helps me maintain my antisocial nature.