Hey there!
It should give +1% per turn per equipped piece, if that is not the case then it is a bug. I might have made a mistake on the multiplier, I’ll check once I have some free time.
It is not implemented yet. That scene is a temptation scene that requires the Libido Ring to be equipped, which is also not implemented yet. I think the first temptation scene will be implemented in version 0.75 and that scene in specific will be added 1 or 2 versions later.