70. In "Lucky Leon" when Clark and Lois kiss, Clark is so glad that he forgets not to levitate, so Lois realizes that CK=SM.
71. In "Individual Responsibility" when Clark is acting odd in the same way that SM is, Lois realizes that the simplest explanation is usually the right one, and that Clark is SM.
72. In "Individual Responsibility" when Clark gets exposed to the red kryptonite in Gene Newtrich's office and he stops caring, he decides to go for what he really wants. So he grabs Lois and flies her back to his apartment without even bothering to change into his costume.
