With all this talk about Balanchine and the crotch, what I found most disturbing was the clip from Ashton'sMonotones. The female dancer, clad in a white long-sleeved, long legged leotard, with a white cap on her head, and white pointe shoes, raises her leg to 6 o'clock while being slowly turned by two men---I thought, How Grotesque! she looked like a flag pole.
I know the moment you refer to -- I don't really think of it as grotesque, but it's very disctintive, in part because Ashton's physicality is usually less manipulative. I think the the Monotones are his most Nikolais-like works -- exploring the body almost without reference to ballet, and yet finding moments of pure classical technique