Hvor kom udtrykket fugle og bier fra?
Morris, William & Morris, Mary (1977). Morris Dictionary of Word and Phrase Origins. New York: Harper & Row. ISBN 978-0-06-013058-9.  Citeret i Zimmer, Ben (5. maj 2003). "Where does the phrase 'The birds and the bees' come from". alt.usage.english - via Google Groups.
Morris, William & Morris, Mary (1977). Morris Dictionary of Word and Phrase Origins. New York: Harper & Row. ISBN 978-0-06-013058-9.  Cited in Zimmer, Ben (May 5, 2003). "Where does the phrase 'The birds and the bees' come from". alt.usage.english  – via Google Groups.
The birds and the bees