1. Your Ex.
This is common sense (or should be.) But I admit, it’s hard to resist — especially when baited with, “so, how long have you been single?” (Guys, stop asking us or prepare for a walk down our road of relationships past.) Conversing about past relationships (good or bad) shifts the focus on your past and away from your current connection. Besides, droning on about an ex’s faults does nothing but clue your date in on your questionable taste.