> <i>It’s pretty clear that the data does not support the conclusion that better dates are correlated to higher heart rates.</i><p>...so the post <i>admits</i> that correlation does not imply causation?<p>There are many, many reasons why a heart beat will spike. The number of spike is irrelevant. An average heartbeat for each date vs. average heartbeat for normal behavior would be a better comparison, but still flawed (e.g. coffee dates!).