There are two reasons why Lex might have decided to woo the lovely brunette reporter.
First, there is the fact that Lois is a beautiful woman and would attracted Lex's attention on a purely physical level. Of course, we all know that Lex wouldn't have been interested in anything more than a dalliance if that had been all Lois was. But, Lois was driven, intelligent, and not over whelmed just to be in his presense. That made her a challenge. Lex loves a challenge. It would have been analogus to taming a wild Mustang.
The other possibility is the pheremone thing.
The real crux of the problem here is the same error that the television series made. Lois was an intelligent, independant woman, who was also a closet romantic. Therefore, no matter what might have happened to her 'support system', she would never run into the arms of a 'convenient' suitor. Lois would never agree to marry someone she didn't love. Period. End of story.
Tank (who seems to have a few inflexible opinions about Lois that not everyone shares)
