Fitbit sex experiment on blog.jizz.xxx

Redditor noveltysin wore her Fitbit while she had sex and shared the resulting graph of her heart rate with the rest of the world.

Check out how well her graph matches the heart rates in Figure 1 of the classic 1956 paper Physiological Responses During Coitus.

She didn’t included foreplay, so start your comparison at “period B” in the graphs.

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