CBC 27th March 2017 - hand 14:

In an auction where they are stopping in 2 of a major, it is almost always correct to bid with 7+ points.  However, with a poor suit, DBL do NOT bid your own suit.  Partner knows it is balancing as you have passed twice but give the option to find a fit or leave for penalties.  On this hand, I DBL and partner passes for 100%.   Of course, I bid like an idiot and 3♥ is a 0% - will I ever learn?