gaius petronius
Bust of Gaius Petronius

Petronius was apparently a Roman courtier during the reign of Nero. Here he advises avoiding impulsive desire in order to “keep an endless holiday”.

Entire poem (Translated by Ben Jonson)
Doing, a filthy pleasure is, and short;
And done, we straight repent us of the sport:
Let us not then rush blindly on unto it,
Like lustful beasts, that only know to do it:
For lust will languish, and that heat decay.
But thus, thus, keeping endless holiday,
Let us together closely lie and kiss,
There is no labour, nor no shame in this;
This hath pleased, doth please, and long will please; never
Can this decay, but is beginning ever.
Gaius Petronius
Latin proverb about conventional sex

Omne animal post coitum triste.

Translation: All animals are sad after sex.