Yep I have come across Percy's foibles and S& M links apparently via his mother making him play piano.

Also stories of his great leg power from travelling through Lincolnshire on his bicycle and being able to jump up and down flights of stairs.

Vicky Clayton, pro Lincolnshire folkie is I believe quite an authority on Percy Grainger

I believe Unto Brigg Fair vinyl was largely down to Percy's recording made in 1908 on wax cylinder and clearly his collecting influenced his later compositions