Last three people left on earth- father, mother and pre-adolescent son. Father sterile. Teaches son how to impregnate mother

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    What year did you read this? Do you think it was old at the time? Do you remember anything of the cover? – Dreamwalker Jul 30 '15 at 7:27
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    @Raja Setlur: Also, was it originally in English? Did you read it in a magazine or was it part of an anthology? – Joe L. Jul 30 '15 at 12:09
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    Never mind that there would be absolutely too little genetic variation to sustain a human population with three individuals, we're talking about bangin' mommy! – Lexible Jul 30 '15 at 16:09