Maybe in the song, it shows the story of a couple who wants to grow old together and have a home but their family (or something else) gets in the way.
The bottom line is that the steam wands on the espresso machine need to be cleaned after EVERY use. ... The reason that you need to clean the steam wand after each use is that the milk dries on it very quickly after the frothing process and dried milk is incredibly hard to remove once caked on.