TheCodeBreakers
might become involved in social or legal difficulties if their sexual
histories became publicly known."
Lovers could sometimes find themselves in the same difficulties if
their liaisons became known. Consequently Ovid, in his Art of Love,
offered counsel on how to correspond clandestinely, mentioning some
primitive forms of secret ink:
Tuta quoque est fallitque oculus e lacte recenti
Littera: carbonis pulvere tange, leges.
Pallet et umiduli quae fiet acumine lini,
Et feret occultas pura tabella notas.
Or: "A letter is also safe and escapes the eye when written in new
milk; touch it with coal dust and you will read. That too will deceive
which is written with a stalk of moistened flax, and a pure sheet will bear
hidden marks." He also advised using pronouns of the opposite sex, such
as HIM for her.
Among the strange means of secret communication to which lovers in
annaabi.ee 
