Smarter than boys: You have to be smarter than this. Boys often don't tell the truth. But, you should also know that any uncovered erect penis in the vagina can cause pregnancy. A stimulated boy will be leaking semen long before ejaculation. Semen has fresh sperm in it and is well known to cause pregnancy. Pre-cum comes from the prostate gland and has the same concentration of fresh sperm as ejaculate.
Answered 6/15/2014
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