If a particularly sexy woman has been in sight (or in mind) during the day, my balls seem gradually to store up lots of spunk in her honour, and when I go to bed, if I think back to her and what I'd like to do with her, I can be stroking myself for anything up to an hour (at a guess, I don't time it) before everything explodes in a fountain of deliciousness. mmm...

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Erotically yours... Gus