Please note: this version of the BlackBook app is designed for research purposes only.
BlackBook allows you to track your sexual health. BlackBook will make it easy to track your sexual encounters. You'll also be able to keep track of your test results and see trends and insights about your activity.
BlackBook allows you to track your sexual health. BlackBook will make it easy to track your sexual encounters. You'll also be able to keep track of your test results and see trends and insights about your activity.
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