According to the late, great George Carlin, it is NOT a musical instrument
It's the same with those unfortunate mutants who think wind chimes are a musical instrument
When a female vegina has become so lose from sexual activity that her vaginal lips blow and chime in the wind.
"Beth has had sex with 300 men--now her veginal lips hang, dangle and sway in the wind," said Jim.
"Yes." said harry. "she has wind chimes!"