I wish it was socially acceptable to interest-dump someone and for them to do the same to you.

Just getting a 5-10 minute lecture deep into a topic that someone is passionate about is fun and educational! Much better than trying to make small talk or talk about the 3 common topics at your workplace (at mine it is local tv, energy spending/taxes, and cars), which is often sports. Then you get to learn about other people's interests too!