In German times prior to World War I this was - outside of Kokopo, at Rabaul - the stomping ground and major enterprise of the American-Samoan, Queen Emma, whose island group H/Q was Langu plantation, Vitu, and whose manager, a Dane named Peter Hansen, became quite famous for his retinue of concubines, some 26 in number, this the more surprising as the male:female birth ratio in Vitu proper was of the order of 103 males:100 females post-weaning. That is reversed upon Unea, and the social doyens of the upper Witus are or were the ladies happily bride-stolen by the Mundua and Witu lads on wife raids, there being no bride price to pay, and this keeping the populations pretty much stable and balanced wrt genders and genetic make-up. These figures are from the late 1960s and may not apply today, as one in fifty persons in Nuigini are now positive to HIV (Air Nuigini In-Flight magazine, Sept. 2009). Nonetheless it is an extremely rare occurrence wrt population make-up.