IDK man my friends and I will talk about stuff when we hang out, the most random obscure thing no searches for it phones just sitting locked on the table and without fail we always get loads of ads for the things right after, heck one time we did it as a joke and had a conversation about sewing and still got ads for sewing stuff. I have not once in my life ever looked up or shopped for anything sewing related yet after that conversation about 2 hours and change later boom sewing ads everywhere
