I agree. Even with non-evil homosexual couples, there seems to be a good deal more intimate (titillation) panels with female couples than male ones.
Though I have to admit there is are whole lotta of folks that want to redeem the evil/murdering Lex Luthor, though. Or have him never have been evil. I'm not one of them.
In Batman:TAS, it seemed possible Harley could be redeemed. She was newly in Joker's thrall. It was very abusive and manipulative relationship. But when she was introduced in the comics, she'd been enabling his murdering sprees for a good while, if I recall correctly. And, of course, the character developed in a different direction.
Still, the constant switching of alliances is irritating to me. After more than one switch, no other character should trust them anymore. It's a trope pointed out by an article on this very siteAh, the much beloved heel-face-heel turn. Basically, this has to do with villains become redeemed… only to turn evil a day later. It happens a lot, perhaps most frequently with Batman’s rogues.
Sadly, the same thing happens with heroes. They turn evil for no reason but shock value and act completely out of character (often, but not always retconned as things they did years ago when we know damn well it was out of character at the time because we were reading then). Big brouhaha, then back to status quo - sometimes with another retcon. And with heroes we accept it and sweep it under the rug because we feel it was bad writing to have them go bad in the first place.
I don't mind redeeming villains (on rare occasions - we need villains), but have to do something to make up for their ill deeds, not just say they are good now or save the world once (hey, they would have died, too, so it was self-preservation). And what they have to do is proportional to their crimes. I'll let White Lightning (old Impulse villain) off easy. She's basically a nuisance trying to stick it to daddy. But violent criminals have to go further. Murderers are a hard-sell, and mass-murderers are a no-go.