In my own case, I recollect acts performed by older persons in ignorance and thoughtlessness which undoubtedly tended to foster and strengthen my algolagnic instinct.    From Wordnik.com.  [Studies in the Psychology of Sex, Volume 4 Sexual Selection In Man] Reference

If I were to allow myself indulgence in algolagnic reveries they would even now excite me without difficulty; but I have systematically discouraged them, so that they give me little or no practical trouble.    From Wordnik.com.  [Studies in the Psychology of Sex, Volume 4 Sexual Selection In Man] Reference