DTR?

Am I the only one that wasn't familiar with that term?  Apparently it is something that is necessary at some point between two people in a relationship, or at least where there is promise of a relationship.  I suppose I am familiar with the concept; I just never knew that there was a term for it.  I am so glad to finally know what to call it.  Oh, by the way, it stands for "Defining The Relationship"...  How nice.  Back in my day I guess we simply wandered around aimlessly never knowing the importance of DEFINING IT!  I guess, "it's complicated"...