It takes 1 little sperm. that's it. that's all it takes, so it doesn't matter what the percentages are, if you are having sex it is greater than zero.
All this increasing the percentages is nothing more than you not wanting to worry about if she's pregnant or not. So no matter how you slice and dice it, what you are looking for isn't anything more than peace of mind. But it really doesn't matter, you either are ready or not ready for the consequences of having sex i.e. having a baby.
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I don't care if you are black, white, purple, green, Chinese, Japanese, Korean, hippie, cop, bum, admin, user, English, Irish, French, Catholic, Protestant, Jewish, Buddhist, Muslim, indian, cowboy, tall, short, fat, skinny, emo, punk, mod, rocker, straight, gay, lesbian, jock, nerd, geek, Democrat, Republican, Libertarian, Independent, driver, pedestrian, or bicyclist, either you're an asshole or you're not.
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