Think Of England Meaning

(idiomatic) To (distract oneself so as to be able to) tolerate or endure bad or unwanted sex.

Example:   I just lie on my back and think of England.
  Just close your eyes and think of England.
1912, Alice Marion (née Harbord), Journal, quoted in 2004 in Quotations on the Air (Collins; ISBN 0007183925, page 354):
  I am happy now that Charles calls on my bed chamber less frequently than of old. As it is I now endure but two calls a week and when I hear his steps outside my door, I lie down on my bed, close my eyes, open my legs and think of England.