I think it be a lot of fun to hear both a female and male voice in a Clark/Lois conversation.
Yippee!
Isn't it possible to *merge* the male & female voices using some software even if the recordings are done *separately*?
Though I suppose the process would be really tedious! 
Maybe try for a shorter fic?
Besides, don't most of us have a spouse or a boy/girlfriend? What are they for?