When it is implied that Clark might take Lois to prom, Lois states that there would be men on Mars before Clark and her went to prom together. This is a tongue in cheek reference by the writers to John Jones, the Martian Manhunter who later becomes a reoccurring character on the show. Also Lois and Clark do end up going to prom together, sort of, as she is possessed by the spirit a prom crazed high school girl and not in control of her own body.