why does jekyll need mr.hyde?

I guess we have that whole light and dark part of the soul thing going on here. I don't know if Jekyll needed Hyde rather than he could not resist the lure. Hyde was an alter ego that was not constrained by the bounds of society. Victorian England had many rules and social constraints. Hyde meant freedom and Jekyll became obsessed with this side of himself. I could get all Freudian, with the ego and the id, but I'll just leave it with this; Jekyll turned towards his repressed dark side because it was overwhelmed him and was really more fun!

Hey is this Hannah Causey? haha