I would say that any wise married man could tell you this. It is why your bedroom is um... not like your college door room!
I would love to hear the story behind this one.
I live in the half glass full world for this subject. Most, if not all my wife's friends are surprised we have speakers at all. I hear "You know, they make these great little speakers, I think it is called Sonos".... followed by a death like glance from my wife that says "don't even say it"...