Sybil developed some SERIOUS crush on Lou Ferrigno
"'He's bigger than Steve Reeves,' she offers. 'He's at least as handsome.'"
And the IMDb trivia section: "In the documentary Electric Boogaloo: The Wild, Untold Story of Cannon Films (2014), Sybil Danning stated that she would've preferred to have seen another more 'adult' version of Hercules. She was probably hinting at the original script that Lou Ferrigno completely objected to and probably the reason that Danning signed on to co-star in the film."
It seriously looks like she developed a crush on Lou. But, hell, who can blame her?