&gt; The bonobo example is a little overplayed.<p>No:<p>&gt; I don&#x27;t consider &#x27;sexually greeting&#x27; each other by grabbing assess to be on the same page as sex.<p>They actually do greetings by involving their reproduction organs.<p>&quot;Genito-genital rubbing of bonobo females&quot;<p><a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=HdeAJUxJ7gg" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=HdeAJUxJ7gg</a><p>&gt;  but humans don&#x27;t have a 10 day heat period. They&#x27;re in heat all the time.<p>Bonobos and chimps don&#x27;t have too. They do make sex all the time. Google &quot;concealed ovulation.&quot; That&#x27;s the evolved mechanism where female never signals when it actually ovulates. And it&#x27;s present by bonobos.