Didnt some of your brothers make the sisters sit in the back if they were alone together! lol.
I think they served to highten the mystery of sex that we all became obsessed by it, no wonder so many of us gave into temption - I mean honestly your body is naturally going through changes and then your told to deny it all including masturbation, I lived in guilt for so long over that, I can remember being in tears before the elders at my judicial, saying I have stopped the fornication but I keep failing at masturbation. For me that was one of the many things that I realised was so wrong with it, I mean does anyone tell you how to masturbate? No you just try it and it happens, whats more natural than that?