NOW HOLD UP A MINUTE,” Duncan protested. “There’s no use blowing a gasket. I haven’t got the time this morning to listen to your lecture.” “But it’s not the lack of s*x that worries me entirely,” Shotwell said, “although it’s the central factor. There are subsidiary situations deriving from that central fact which are most intriguing.” “I have no doubt of it,” said Duncan, “but if you please—” “Without s*x, there is no basis for the family, and without the family there is no basis for a tribe, and yet the natives have an elaborate tribal setup, with taboos by way of regulation. Somewhere there must exist some underlying, basic unifying factor, some common loyalty, some strange relationship which spells out to brotherhood.” “Not brotherhood,” said Duncan, chuckling. “Not even sisterhood