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You suck at giving sex advice.
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http://www.managingcontraception.com..._10-20-00.html
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the percent of women experiencing an unintended pregnancy within the first year of using withdrawal as a method of birth control is from 4 % (perfect users) to 19 % (typical users).
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These are people who regularly go near ejaculation and withdraw beforehand, a LOT more stimulation, depth and frequency involved than just poking around.
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Some concern exists that the pre-ejaculate fluid may carry sperm into the vagina. In itself, the pre-ejaculate, a lubricating secretion produced by the Littre or Cowper's glands, contains no sperm. A study examining the pre-ejaculate for the presence of spermatozoa found none in the samples of 16 men. The chances of such sperm [occasionally found in precum, left behind from a PREVIOUS ejaculation] causing fertilization must be low, though not negligible." Malcolm Potts and Peter Diggory, Textbook of Contraception
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Now can we stop hating on my sex advice and get back to the OP?