Not everyone is a nerd.
While not a perfect statement, it is important to remember that not everyone you meet on a daily basis is going to be able to catch your subtle (or notso subtle) references to that think that gets your proverbial nerd gears going. It’s not their fault and it isn’t your fault; nerds (as a proverbial whole) are people too which means that our interests vary greatly across the board.
The Nerdette's Guide. 