"...you are neither cold nor hot. I wish you were either one or the other!"
Jesus says he is 'stressed out' over the lukewarm Laodiceans. Everyone likes 'cold beer' or 'hot coffee', but who likes either one of them lukewarm? When anyone gets a mouthful of 'lukewarm' beer or coffee the first thing they want to do is spit it out of their mouth.
Come Lord Jesus!