Drummer and Missy's Place

[Biowatch]

https://songmeanings.com/songs/view/3530822107858715870/

Here's the thing. Winwood was 16 or 17 yrs. old when he wrote this. In those days, street slang for heroin was 'boy' and for cocaine was 'girl'. High heel boy refers to a mixture of heroin and coke, commonly called a speedball. The 'low spark' is a description of the physical feeling brought on by injecting the speedball.
The man in the suit is the dealer, making profits on the dreams of his customers.
The gun that didn't make any noise is simply a hypodermic syringe.
This is one of the most truly savage songs in history, way deeper than nearly anything else from its era.
How Stevie knew this stuff at such a young age is an interesting question at such a young age is a good question

And other comments…

Still, a great song.