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by Sir_Vival 2439 days ago
You're right on the second point - we were all always taught that precum can contain sperm. It can...if the guy hasn't urinated after ejaculating the last time he did it. Not all that long ago someone had the bright idea to actually test it and found no sperm otherwise.

It's certainly not a foolproof method but the success rates are up there with condoms, when both are used properly.