I think it depends on how long your hair is. If your hair is short or "normal" male length, I don't think you need conditioner (unless yer hair is really dry and damaged). On the other hand, if you have long hair (mine is down between my shoulder blades) then you should definetly use a seperate conditioner.
BTW, I find your thread title sexist, chix aren't the only ones w/long hair
Lethal