The mythological demigod Hercules is bisexual. How you feel about that fact doesn't change the fact; the myths of antiquity have told us that Hercules loved women and men alike. Lustfulness is at the core of his character, and Hercules' appetites aren't limited by gender.
Like many ancient myths, and like much of history, Hercules' stories have been bowdlerized by those who think same-sex relationships are sinful. Audiences introduced to the character through the Disney cartoon, the Kevin Sorbo TV show, the Dwayne Johnson movie, or the Marvel comics have good reason to think the character is heterosexual, because that's all they've ever seen. But that doesn't make it true. Hercules is bisexual. To deny that fact is to participate in the erasure of same-sex relationships on the grounds of a narrow and prescriptive morality.