Big difference between Superman and Batman with their female rogues is that Batman's end up having sex with him, whereas it's kind of treated as a taboo topic for Superman to have sex, sometimes even with his own wife... [facepalm]

Also, we can't forget that there are still a lot of artists and fans who aren't comfortable in a portrayal of Superman's punching a woman in the face. I just went to YouTube to re-watch his kerfuffle with Faora in Man of Steel and I don't think he ever lands a clean strike on her. There's some grappling and he pushes her off him, but no typical Superman haymakers. Plus, any violent moves he applies to Faora come after she gives him a lot of big hits.