Martial 9. 41
“Ponticus, do you think that it’s no big deal
That you never fuck but just use your left hand
As a whore, a friendly crew to serve your desire?
Believe me: it’s a crime and one large enough
That you can barely understand it with your mind.
Horatius, I guess, fucked once to make a trio
Mars did it once with blushing Ilia to make two.
The whole world would have collapsed if either jerked off
And entrusted foul delights to their own hands.
Just think, the nature of the universe says to you:
Ponticus, what you spend on your fingers is a person too.”
Pontice, quod numquam futuis, sed paelice laeva
uteris et Veneri servit amica manus,
hoc nihil esse putas? scelus est, mihi crede, sed ingens,
quantum vix animo concipis ipse tuo.
nempe semel futuit, generaret Horatius ut tres;
Mars semel, ut geminos Ilia casta daret.
omnia perdiderat, si masturbatus uterque
mandasset manibus gaudia foeda suis.
ipsam crede tibi naturam dicere rerum:
istud quod digitis, Pontice, perdis, homo est.
Want to know more about masturbating in Latin? We’ve got that covered.
This poem made me think of this: