But what if it&#x27;s not that they are &quot;commonly accepted rules&quot; -- as if it was a conscious decision -- but more about how the brain is hardwired to act? What if the relatively simple rule of &quot;if you&#x27;re interested, just reply already, dammit!&quot; doesn&#x27;t accurately model how human sexual interactions work? Maybe we do a lot of signalling, some overt, some unconscious, some non-visual, just like it happens with other animals?