be either the a or α (alpha) mating type
and thus display
simple

sexual differentiation. ... 1920 - Eugenics - 102 pages

The mating rituals of some animals are wonderfully bizarre. For

example: did you know that some insects’ genitals explode during sex? ... The female

bowerbirds of Australia and New Guinea are pretty particular about their mates;

they have to combine the hot, sensual moves of a Ricky Martin, ... i had just turned