Don’t you have anything other than height and weight to discuss?
You act like a school kid who hasn’t grown out of these childish and superficial discussions.
Personally, I’m happy if they are in good health and of sound mind.
A 50kg girl of 1.68m would just be too thin.
So you are obviously writing about relatively short women.
Again, another world. I’m not interested in tiny Asian women, especially those with a lack of feminine curves.
So arguing over whether a woman should be less than 50kg is simply moronic.
It’s a matter of taste and yours is not better.