Vidi, vici, veni.
What do you call a composer who suffers from weak ejaculations?
Barely O's.
(ETA Hector Berloz, for those not into classical music)
AJ
And one who has lackluster ones would be Oodie-Os (though that may be a purely regional pun, not a standard English term).
vōs mea dēservit jam verpa dolēte puellae
pēdīcat cūlum, cunne superbe valē!
One possible reconstruction of graffiti found in Pompeii. It roughly translates as:
"Weep girls, my dick has now abandoned you
now it fucks ass, farewell conceited cunt!"
The Ancient Romans had a pretty rough sense of humour. This is one of the cleaner pieces. There's a lot of who did what to whom where (naming names) and scat jokes.