It comes from having dated a bass player for many years.
I hear bass lines now, all the time, thick, fat, juicy, slap bass lines.
I also hear certain kinds of drum beats for the same reason.
Before, in my early 20's, when I had not spend significant amounts of time with musicians, I only heard words, perhaps a tiny bit of melody.
I could pick out a twelve string guitar from a six string, but it was mostly all words for me.
For the most part I am still fond of words in music.
I hear them first.
I am most impacted by good, clever or evocative words.
I am irritated by guitar solos.
I am irritated by opera and long stretches of chanting, classical religious music and most classical music.
I am a bit of a peasant in that respect and I am fine with that.
I have no desire to learn to appreciate opera at this stage of my life.
Maxwell often beats our drum beats on his belly, or chest, which I find deeply annoying. I am not a fan of African drumming, or hippie drumming.
One of my teachers at the preschool recently introduced a bongo drum into the classroom and my jaws clenched at the very thought of it. A jam band makes me want to scream, although I enjoy a number of Grateful Dead songs, but I like the recorded versions, and would never chose to listen to the long live recordings.