It's clearly a prosthetic. Looks so fucking fake, especially with the bush and where you can see the seems.
Also, what is with this historical sex dramas and all these dicks? Y'know the people back then HATED giant cocks. They actually thought they were damn abominations and deformities. Small dicks were actually valued.
He is lucky he's so damn fine and we got a more butt-focused scene.
I've been studyig antiquity since I was a child. Moreso the Greeks, the Romans had similar views.
At least they got the uncut cocks right.
I distinctly remember that one scene in the og series where the gladiators stripped and how they were marveling at the one dude's big dick, saying he was "blessed by Priapus"... the one who has a freakishly large dong and his lust is equated to that of animals. Can y'all do more than just glimpse at the encyclopedia entry?