Why say 少说两句 to break up a fight? In the movie 北京遇上西雅图 (~25m45s), during an argument the protagonist calls another pregnant woman a 骚货 (&quot;slut&quot;) and they start physically fighting.  A third woman tries to break them up and says:


行了 行了 别别别
少说两句 少说两句 哎呀 肚子 肚子 孩子

I don't understand why she would say 少说两句 in particular, which means something like &quot;say two fewer sentences&quot;.  I think the general idea is &quot;stop speaking uncontrollably&quot;, and HiNative posts (here and here) suggests this is the case, but it's unclear to me why we would say 少说两句.
Question: Why say 少说两句 to break up a fight?
「兩」 here is basically a synonym of 「幾」 (several). 「少說兩句」 means 「少說幾句」, that is, the argument arose out of speaking too much (more likely to drag up disagreements and past grievances), so speaking less is a way of not adding fuel to the fire.
It's not really a way of breaking up the fight, but a way of calming the situation down.