<< A normal human woman has two breasts. A normal human birth is of one child. >>
That's a slightly different matter: the basic construction of mammals is such that an odd number of breasts is not a real option. Teat number indicates a maximum number of viable offspring, not a minimum (obviously, we humans can get away with triplets, but that's largely due to wetnurses and/or bottled milk).
Trotsky
Powered by hypermail