Mr Cameron said earlier this week schools often saw the two-hour target as a maximum and told the BBC that Indian dance was being counted as physical education.
So those big dance numbers, that kind of physical intimacy between Ginger Rogers and Fred Astaire, represented that kind of sexual ardor that movies just couldn't express in the ways that are much more open to us in the last 30 or 40 years.
And since concluding her post-Paris stay in Britain's Royal Ballet in 2006, she has concentrated on "contemporary dance, " which eschews ballet's pointe work but keeps some of its positions and physical accents.