Euphemism for the talk on Sex Education that parents give to
their children. The expression comes from the many analogies
used in the talk, contrived to cover the parents embarassment.
See Birds and Bees.  I am currently reading the excellent
autobiography Experience by Martin Amis, from whence came this
joke (as told to the author by his father, Kingsley Amis, and
before that by his father to him)  This is paraphrased, as I
don't have the book to hand  Life is good on the farm, where
little Davy is growing up in the sunshine and approaching his
twelfth birthday. One day in the kitchen Ma says to Pa; "Young
Davy's growing up fast, isn't it about time you took him to one
side and had a little chat about The Birds and the Bees?" "Yes
Ma, I suppose you're right. There comes a time in every young
man's life when it's only right that he knows a few things about
nature. I'll 'ave a talk to him."  So, the next afternoon in the
Orchard - a blissful summer's day, the butterflies fluttering,
the bees buzzing, and the b