CATUL. EP. 71.

DE INCONSTANTIA FOEMINEI AMORIS.

Nulli se dicit mulier mea nubere velle,
Quam mihi: non, si Jupiter ipse petat;
Dicit; sed mulier cupido quod dicit amanti,
In vento et rapida scribere oportet aqua.

FEMALE INCONSTANCY.

My mistresse sayes she'll marry none but me;
No, not if Jove himself a suitor be.
She sayes so; but what women say to kind
Lovers, we write in rapid streams and wind.

Richard Lovelace

http://www.poemhunter.com/poem/de-inconstantia-foeminei-amoris/