Why do they call it "the Birds and the Bees"?

Question

what's up with the codename?

Answer 1

It has to do with reproduction, pollination and the beginning of new life. In human terms, we call it sex. For plants it is different, it is purely the survival of the species.
Many plants rely on flowers for reproduction and are very dependent on outside help such as insects and animals.The plants are reproduced by the pollen from the female plant or (female part of the plant in case of an asexual plant) being transferred from the feet or feathers of birds and the feet or body of bees to the stigma (or male part). From there fertilization can take place and seeds form to make the new baby plants.
The birds and the bees help to make the babies, without them there would be no more plants of these species and the species would die out.

Answer 2

Because the Woodcock doesn't speak to the Beavers anymore??

Anyhow, this should answer your question:

The phrase the birds and the bees (sometimes further extended to birds, bees and butterflies) has been common in the language for at least the last couple of centuries to refer in a generalised way to the natural world (do journalists still refer dismissively to the natural-history column in their journals as “the birds-and-bees department”?). The alliteration has undoubtedly helped to make it a satisfactory formulaic expression.

Answer 3

A Long time ago, their was this song that started "Birds do it, Bees do it"

http://www.joanjett.com/Lyrics/lyrics/LetsDoIt.htm

Answer 4

The birds represent the girls I suppose. I suppose the blokes could be called B's sometimes.

Answer 5

Kentucky Fried Chicken was already taken.