Thanks a lot for your help ! It worked perfectly, now everyone acts according to their preferences, as I hoped (and in addition I learned things about programming, thanks to your explanations).
I actually used Godot Engine for editing because it shows errors as well. So my previous tries were written correctly, I think, (unlike my example, sorry), but I totally messed up the data to edit ... I focused on the partners (next paragraph) and ended up with sex scenes with no participants every time. I had completely missed the line you pointed out to me.
So sincerely thank you for correcting me and giving me the solution that I could not find on my own ...
Have a good weekend!
(and sorry for possible mistakes, not native English speaker)