3 Superman III: You're Not Responsible for the Things You Do While Intoxicated
In the unexpectedly goofy Superman III, Richard Pryor steals the movie by A) being in it, for some reason and B) creating an artificial piece of kryptonite that, basically, makes Superman a jerk (well, a bigger one than usual). Supes stops saving people, embarks on a campaign of superpranks (like straightening the Leaning Tower of Pisa) ...
"'Italy'? More like 'Shittily.' As in that's how you make your buildings."
... starts drinking in the middle of the day ...
The lack of interest those barflies show in the world-famous demigod makes us suspect that this isn't Superman's first binge.
... and starts banging chicks he meets at the Statue of Liberty. Seriously, here's the scene where you hear her moaning in orgasmic pleasure after taking Superman into her room as Cinemax music plays.
"Manners, please. My bulge is over here."
Oh, and he also causes a huge oil spill at the request of said chick, just to get into her panties.
Anyway, after shaking off the effects of the kryptonite by punching himself in a junkyard, Superman goes back to being Superman ... and acts like nothing ever happened. In fact, when he meets with his hot date again, he flat-out pretends he doesn't know her. When she asks about "the other night," Superman simply replies, "That wasn't me. That guy is gone."
"He joined the Foreign Legion. I'm his brother, Dru."
So, Superman thinks that because he was under the influence of a mind-altering substance, he shouldn't be held accountable for his actions. Sure, he quickly fixes some of the damage he did while he was evil, but that's not the same as taking responsibility: What about the ecological damage caused by the oil spill? What about the emotional trauma inflicted upon the Italian singing guy and the Olympic runner whose torch Superman blew out? No amount of superstrength can fix that.
And then there's the woman Superman just pretended not to know -- which was clearly a lie. The fact that he immediately undid his pranks confirms that he did remember his actions as Superjerk, so he should remember her, too. We get that the kryptonite magically made him evil, but think about the horrible message this sends: You can get away with anything as long as you "weren't being yourself."
Clean costume = clean slate.
Thousands of people use that exact same excuse every day -- we call them "assholes." How many times have you heard someone say, "It wasn't me, it was the drugs/booze/artificial kryptonite created by Richard Pryor"? Too many.
Also, we didn't see Superman and his date stop for a leaded condom before hooking up, so presumably he didn't use protection. What if he got her pregnant? Then again, that wouldn't be such a problem for Superman, because ...
2 Superman Returns: It's OK to Trick Someone into Raising Your Baby
In Superman Returns, Superman returns from space after a five-year absence to find that the world doesn't need him anymore (except it totally does, because he can lift planes and stuff). While he was away, however, Lois Lane had a child and became engaged to Richard White, aka the guy who plays Cyclops in X-Men.
"Finally, a chance to be a different kind of stock character. Without glasses!"
However, in a surprise plot twist, it turns out that this roughly 5-year-old child who can throw pianos and bend steel with his hands is actually Superman's son -- presumably the product of a one-night stand unrelated to the Fortress supersex described above, because Lois actually remembers having it (and still doesn't seem to give a shit about Clark). The problem is that she has been telling everyone that the kid's father is Richard, including Richard, who has spent half a decade raising another guy's son as his own.
"Haha, such strong arms!" *passes out*
There's no indication whatsoever that Lois told her fiance that she was already pregnant when they started dating -- he clearly thinks the kid is his. So how does Superman react? Sure, he's understandably shocked at first, but by the end of the movie, Superman is apparently fine with this arrangement as long as he gets to visit his still unrecognized son at night and quote Marlon Brando monologues to him while he sleeps.
"Tattaglia is a pimp. He never would have outfought Santino. But I didn't know until this ..."
We shouldn't be surprised that Superman condones this type of behavior, because after all, lying is a central part of his character. While most parents teach their children that honesty is the best policy, Superman's taught him to deceive the world around him and actively encouraged him to lead a double life for his own good. Lois was simply following his example, consciously or subconsciously -- when some deadbeat demigod ran off to "find himself" in outer space and left her with a bun in the oven, she clung to the son of her editor and fooled him into raising her space baby. Everyone wins! Except Cyclops, who can't catch a break in any franchise.
At the end of the film, Lois and Richard are still engaged, proving to the impressionable girls in the audience that there are no negative consequences for this course of action whatsoever. So don't say Superman films cater to boys only.