I don't know, I post primarily girls hockey stuff, but myself am interested in so much more. This probably varies per user, but my behavior on google properties probably is much more telling.
It's not just about what you post. That's only a tiny variable. It's also about what you have liked, the activities you've done in apps and other sites with data-sharing agreements, and what you click on. Demographics, interest, and personal characteristic targeting is far better on Facebook than anything you can buy on Google Display. I'm a buyer of both, and the difference is staggering.