getting "fixed"

my dog got spayed on friday. and then i wondered, why do people call it "fixed" as if something was wrong with her? it would seem like she was perfect and now is slightly "broken" as all of her little female parts are missing. so sad to see her in pain, and so hard to keep her from being excited and jumping and running...

and another thing: do dogs go into early menopause after being spayed? i mean, i think that if humans have a hysterectomy that they go through some serious hormonal changes, so what about dogs? maybe since she never went into heat it will be less pronounced? or maybe i'm going to have a seriously hormonally messed up puppy for a while. let's hope not...