"The Sharing of Flesh" (also published as "The Dipteroid Phenomenon") is a science fiction novelette by American writer Poul Anderson.

Evalyth Sairn is a woman of Kraken, from a society where both sexes learn the art of combat.

With the aid of an artificial intelligence she finds a way of tracking Moru by detecting the unique chemical makeup of Donli's body.

The AI offers the example of dung flies (the Diptera mentioned in the alternate title) which have evolved to depend on nutrients from prey insects.

The conclusion is that Moru's people have lost the ability to undergo maturation without hormones from the cannibalism.