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1912, James Weldon Johnson, The Autobiography of an Ex-Colored Man:
- And, too, I suffer a vague feeling of unsatisfaction, of regret, of almost remorse, from which I am seeking relief, and of which I shall speak in the last paragraph of this account.
1919, H.W. Long, Sane Sex Life and Sane Sex Living:
- A very frequent cause of married unsatisfaction is the fact of the difference of time that it takes for the husband and wife to come to the climax, the orgasm.