Why do people assume that if you don't talk about something all of the bloody live long day, then you must have absolutely no idea about it?
It's just so bloody arrogant, annoying and boring!
In order to make it stop, I find myself having to more or less be rude by cutting them off and letting them know that I already know that!
For context, I've basically just had exercise explained to me. I used to compete nationally in a competitive sport, I have always exercised regularly and I like to try new things and am reasonably fit (am currently training for a marathon, which is a new challenge for me), but because I don't harp on in the office about what time I get up so I can do a 6am spin class, clearly I need to have the benefits of exercise explained to me!