Call me thick, but I don't see what this dance has to do with breast cancer. I watch the show regularly (where do I turn in my man card?), and I hate it when the choreographers say that the dance is telling a particular story. It seems like a cheap way to make people like your dance more.
If no one told you the dance was about breast cancer, would it still have moved you as much as it did? Did it even matter what dance they did, or were you sold as soon as they gave the premise?