They are so much better at DB'ing than we are. They are able to shut us out of their lives with such ease...or at least it looks easy from where I sit.
This is an easy one. The fact it seems so much easier for them is that they are at least a year and half ahead of you. The BD for you was not BD for her. She started living it up at least a year and half ago. If you think about it, you should be able to spot some unusual details in retrospective.