Once, I was sitting in on a marketing class (that I had admittedly not signed up for), listening to a professor give a lecture on social media and the impact it has on society and the business world. About 40 minutes into the lecture, an older student raised his hand and said, "Everyone knows that social media is just for millennials. How can it possibly be useful for businesses?"
The professor, who was in his early 60s, replied, "Is it? Then why do I have ads popping up on my news feed targeted at old balding men like me?"