Vulcan, Son of Jupiter (1961)
Particularly nutty sword and sandal epic which plays fast and loose with mythology. The main characters are the gods of Olympus (a cardboard set with fog.)
Venus goes to Earth for a quick romance with Adonis. He quickly disappears from the story. It seems this opening scene was just to establish the fact that Venus (played pretty much as a blonde California beach bunny) likes the boys. Up on Olympus this displeases Jupiter, so he decides that she's going to marry Mars or Vulcan and settle down.
Vulcan (not crippled in this version of the story, but in fact a muscleman) seems more interested in forging swords and a shield for Achilles (so why are we using Roman names?) but gets into a fight with Mars (an Aryan type, not as muscular as our hero.) Vulcan kicks his tail pretty easily, so Mars and Venus, with the aid of Pluto (also a muscleman, although he doesn't do anything with it) go to Earth to rebel against Zeus. Vulcan intends to follow them to stop their plan. Pluto "helps" him get to Earth by stabbing him with a trident. Vulcan winds up on the beach surrounded by dark-haired bathing beauties, one of whom will be Vulcan's love interest.
Next we have an odd subplot in which Vulcan and the ladies are captured by lizard men in very bad costumes. They escape by having a midget hide in a basket of garbage and get thrown into the sea so he can contact Neptune for help. The little fellow will turn out to be Vulcan's sidekick and comedy relief. Neptune sends up some tritons who free the prisoners. Back down under the sea the love interest has the mandatory dancing girl scene, and rivals Venus in her degree of undress.
Meanwhile Mars and Venus are plotting with the king of Thrace to build a tower to lay seige to Olympus. This seems like a bad idea for a couple of reasons. For one thing, by the end of the movie this flimsy wooden tower is maybe the height of a one story building. For another, Jupiter is a god, after all, and can not only zap folks with badly animated lightning bolts, but can send Pluto down to the Underworld with a wave of his hand.
Anyway, Vulcan and his sidekick and his girlfriend go to Thrace to stop Venus and Mars, and we get our big battle scene, as well as the catfight between Venus and Vulcan's paramour. Along the way they're attacked by some mutant/cavemen types, in another irrelevant subplot. Somewhere in there you also have a rather fey Mercury and a couple of other gods who show up to say a line or two then disappear. It's all quite silly and amusing.