Thanks for the reply
Another woman confirmed that the anklet is probably too inconspicuous to be noticed by the black guys (the small QoS symbol dangling from it) and suggested I may get more out of it going for one of these temp QoS tattoos on my ankle, taht look likely more conspicuous.
The fantasy will most likely become so strong that I will try it it out in the end... and me being terribly scared... but also very much feeling excited... and most likely, nothing will happen
I am still a bit worried if it could not turn out to be dangerous...