Hi Tom!
If your aim was to give the listener a sense of unease - mission accomplished. By the second verse, my understanding of the subject moved from a person with an interest in another to someone developing a ‘fixation’.

Musically, the band was good, but I’d have preferred it to have more volume to give it oomph.

The line about the hip replacement and its effect on … is that a thing? It seems there are many body parts that conspire to dampen enthusiasm.

Despite my unease, I enjoyed the song and it gave me a chuckle.

Andrew