Taste in music, as in anything else, is acquired. While it is exceedingly individual—you are the one who forms a connection with particular compositions—it is also something that is shared. The people with whom you form bonds often like the same music that you do, more so than, say, they all share a taste for herring. Your friends may enjoy reading the same authors, but the likelihood of that is less than their liking the same music. This is because music is something that occurs in the environment such that while we are sharing experiences with our friends the music is there, at some level of common perceptibility: it may be in the background; we may be at a concert and it is in the foreground. This level of commonality can be built over time: people who share, generally, an affinity for a finite-yet-permeable set of musicians will, for example, read this website and not go searching for opera or chamber music or what have you. So there is a reinforcement of beliefs and tastes.