First, despite the editor's previous assertions that a woman can't keep a secret, there was an imaginary story that had Lois marry Superman, with this very reasonable explanation of what made Superman change his mind:
Not everything is super kissing and eye-broiled burgers, though. Sometimes Lois gets jealous. Like when Superman has to give a plaque to a famous actress, and gets a hearty "thank-you."
I love it when they fight. Let's see a few panels of that (from Lois Lane #38):
These next panels prove that Lois and Superman's fights are far more interesting than the ones I have with my boyfriend.
Hardly any of our fights include the line "I'm going to take you to that distant small planet and clear myself!" And only one of them ended with me being placed in a plastic bubble and carried into space, arms folded and pouting.
In conclusion, I want to share this random panel that proves that Superman is totally, totally creepy and weird: