To the pure, all things are pure...

[janedavitt]

After they got mentioned in a discussion here, I decided to read all my Angela Thirkell's again. I'm almost at the end of The Brandons and I came across this line and snickered, unfairly, as it's not nice to read in meanings that weren't intended. Not that i ever claimed to be nice...

"I know that once Lydia is on her cock nothing will get her off."

Anyone want to guess the context?