Gramp's advice is certainly appropriate if you're going to be trapped on a ship with the same guys for months on end. And it's a rule of good etiquette for dinner parties and other occasions when polite decorum should prevail.

But otherwise, politics should be debated, vigorously and often. Men in every age debated politics — from the Grecian Assembly to the Roman Forum, from the salons of France to the mutual improvement societies of colonial America. Being able to reasonably discuss the political issues of the day was considered a vital and essential part of being a well-rounded, well-educated, man. Indeed, one of the express purposes of education during this time was to equip men to be able to hold their own in the political forum.