I bought a couple of 'Hello Kitty' flash drives close to a year ago. It was a joke, people kept stealing my generic looking ones. The Hello Kitty sticks stay in my desk. Since then, every other time I log in, Amazon has to breathlessly show me various Hello Kitty things. An impressive panoply of products, but ones that I'm not especially interested in.
If that bothers you, then definitely avoid clicking any links on The Worst Things for Sale. The recommendation algorithm doesn't automatically discriminate between things you might want to buy vs. things you looked at for shock or humor value. Thanks, Amazon, but I don't need a 55 gallon drum of personal lubricant at the moment.