You mean to keep it light, and your mouth lands the one question everybody at the table was stepping around. Mercury keeps the light surface remark on one arm of the see-saw, Pluto loads the probe for the buried thing on the other. Chat, and you suspect you are wasting your own depth. Dig, and you fume that nobody is ready for what you hauled up. So you spook the person who only wanted a pleasant afternoon, then bore yourself blind in the small talk that was the whole point. Read the room before you choose how deep to go. The surface is knowing too. Knowing when not to dig is one of the rarest disciplines you have.