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We're scientist and we've been working hard on a new formula that would make it nearly impossible for loser white men to impregnate me. If it turns out correctly you'll be able to impregnate with your BBC just by putting yourself inside me! So we decide to test it out! We have been working together on this for months so who better to test the results than us! I use the formula and you pull out your big black cock and I start riding you! We need to see how pregnant you can get me on the first try !