A historian in the 31st century is idling looking through some old records of the predecessor to the United Federation of Galaxies brought back by one his esteemed colleague, Indiana Kirk. Indiana is rumoured to be one of many descendants of a legendary starship captain and has been researching his family tree.
Amongst the data brought back is a reference to an obscure and ancient civilization once called, the Klingon Empire, long ago vanquished by natural selection. There failure to survive apparently was related to a curious habit following their mating rituals that required them to run off down to the pub and tell all their mates about it. Soon, the pub ritual became a cultural event in it's own right, and fellow Klingon Warriors would travel from far and wide to partake in all manner of activities to celebrate the occasion. In true Klingon Warrior spirit, many contests were held, the most favorite of these being the 'wet t-shirt contest'. Klingon battlecry's could be heard from one end of Q'onos to the other whilst the bloodwine flowed freely, "Show us ya G-Racks!".
Unfortunately, whilst the more fragile sex of the species was engaging in these festivities, the Klingon women, guided by two Federation benefactors (who's names are witheld on the grounds I might be incriminated, and known only by their code names, the Photon Goddess, and the Rolling Pin of Destruction), formed a new autonomous self-governing body, who's first act was to create the Subjugated People's Emancipation Relief Mandate bank. Oblivious to their now redundant status, the male Klingons of the society eventually took on a new role, reflected by the diaper change tables on the bridges of all their starships. The newly developed Diatomic IntraPhase Lightwave Dissemination Odometer technology, among many new scientific breakthroughs during the following Matriarchy, however, occasionally had power failures, and it was only for this reason alone that the male of the species were kept around at all, as a token gesture.