In a perfect world there would be a perfect internet and perfect chat rooms.
You are right. This issue has, in fact, been discussed already. No one brought up your idea of finding someone else’s humor better than your spouse’s. Actualy, that’s pretty humorous, too. Would you ban reading newspapers or magazines, for fear of the same thing?
Most people here are posting to the audience, and are not having personal conversations. The problem with cross-Mechitza conversations in this CR, isn’t that it will get people into trouble. It is an issue of Vekidashta.
I do recall an instance of a man-girl hee hee giggle giggle conversation here. It was pointed out and stopped.