It sounds like you don't have a firm grasp on what is and isn't tempting behavior. No one watches Looney Tunes or Batman and then goes out and drops anvils or tires on people's heads. But watching sensual scenes, especially those that are teasing nudity, can be a gateway to a very problematic addiction especially if cultivated at a very young age. It just isn't necessary. My kids will get plenty of exposure to that for the rest of their lives, I'm not going to go out of my way to show them now. The fact that it was also out of wedlock, involving Superman (yeah, I get it, this isn't my father's Superman, didn't need THAT drilled any further) who is supposed to have somewhat loftier convictions than your average dude, etc., just something that I'm not going to pay money to expose my kids to.
But that's me, you get to raise your own kids however you see fit.