I created a performance as a game with the visitors.
Two light fields were situated on the ground of the exhibition space; one was for visitors and one for me.
I was staying there for the entire time of the exhibition.
If the visitor stepped into his field he had the possibility to give me a grade in the same way that I gave him one (on a scale from 1 to 6).
This procedure was organized via a looped sound line that created a strict choreography of time and action.
Finally it was a secret procedure, whereby both participants did not know what grade the other was giving, and they were not allowed to talk. 
Only the final grade number stands as communication, reflecting the fact that every country has its own grading system.
As my secret I graded the sexual charisma of my antagonist.