We all know that forming a real connection with another’s wife is a serious aveirah. I think the misha states “al tarbe sicha im haisha” because some people might mistakenly believe that small-talk doesn’t form any connection. Recently, I have heard about terrible online swindles in the news, where foreign crooks swindle lonely, vulnerable women into transferring large amounts of money to them. How do they do this? They form a false connection with the women through excessive small talk. They chatter for hours online, and the woman thinks she has developed a real, deep bond, when in reality, there is nothing there at all. The chatter obviously has a lot of power.
im sorry if this sounds offensive but that is why the gemara says nashim daatan kalos