It was stupid to think lightning would strike twice in the same place. And for all the things she was—spoilt, self-absorbed, catty, bitchy, etc.—Jackie Burkhart was not stupid. (Michael was stupid. God, how did he fall off the water tower every year? Idiot. She was lucky to be rid of him.) (Well, abandoned by him, really, but whatever.)
So this thing with Steven, it wasn't anything really. Just boredom from a summer spent watching The Price is Right (and not sulking). Because they were two hot people (even if his beard was scruffy, it did make him look older and bad) and obviously that meant they should make out and stuff.
Jackie could almost believe that, too. (Even after Michael, Donna and Eric got back from their California adventure and the fling didn't end. In fact, she could fool herself into thinking she wasn't falling for him—because it was sick and wrong—all the way until he shaved that stupid beard off for her. There'd been no denying it after that.)
(And, later, when she convinced herself that the guy she actually loved was Fez of all people, Jackie didn't think about the astronomical odds against lightning striking a third time. She didn't think about the way they didn't quite fit together right or how even their first kiss felt forced in a way.
No, Jackie didn't think about those things because she wasn't stupid. But she was lonely and Fez was there and it was good enough.) (She could almost believe that, too… except whenever she saw Steven around. Then all bets were off.)