When should you act manly? Never. Your manliness should never be an act. With one exception: If you are an actor playing a part which calls for you to act manly, then and only then are you allowed to pretend to act like you have a pair even if you don’t in reality have a pair. Like, for instance if you were hired to impersonate a lumberjack. Or some other manly archetype. Then “acting manly” is acceptable. Doing so under any other “pretend” circumstance will get you permanently excommunicated from the Roundtable Of Manliness and banished to the outskirts of The Kingdom Of Mangina. Where you will then have the pleasure of evacuating your bladder from a sitting position. Which would serve you right.