Is it THE mistake for a man to talk to women about other women?

Like, is there any magical siren that makes everyone know he friendzoned her just by mentioning another woman? My friends told me I should never have mentioned another woman when talking to a certain woman. I just didn't say I'd even want to friendzone her. I honestly don't like how others take for granted to decide about my intentions with people.
Is it THE mistake for a man to talk to women about other women?
Post Opinion