Here is the relevant reference from the Books where Curvature is mentioned.
I make no pronouncements on these matters, but report them as I find them.
Arrive at your own conclusions.
I wish you well,
To be sure, the shoulders, for example, lead to the delicious curvatures of the breasts, those, too, the property of the master, and thence to the waist and belly, and thighs, and the slave's helpless, delicate intimacies.