The Papua New Guinea has a Yam Festival to celebrate the yam harvest. Women are given permission by the tribal chiefs to catch and rape men from another tribe. The yam harvests in the past 20 years has diminished and the importance of the festival has also similarly degraded. However, for the sex tourists, mainly Australians, the islanders stage a scaled-down festival in which the men are given a head start, then the women are released. Of course the men allowed themselves to be caught.
In case you horny guys are interested, Papua New Guineans are of Melanesian stock, the same as the Australian aborigines.