What’s the equivalent expression for “Never discuss politics or religion at the dinner table” in your country? Also, how often do you say and/or hear it?

One would assume that such an expression is more recurrent in a country marked by stark political polarization or religious divisiveness.

Yet, as far as some anecdotal accounts go, sayings of this kind still seem to persist in European countries where either political debate is fairly conciliatory and constructive or secularism is widespread. That’s why I’ve gotten curious about it.