Are dual sinks necessary? (link)

Now this is a good question.  I've always thought it's a good idea for two people using the bathroom at the same time, but I see that it might also be wise to keep your spaces separate--both for space and to keep the blame game down.  What have you done with my tweezer or...?  Check out the discussion and photos here: http://blog.hgtvremodels.com/2014/04/16/dual-sinks-in-the-master-bath-need-it-or-not/