A conversation with Kaitlyn

My little girl is 19 months old. 19 months. She acts like a 3 year old, it's incredible sometimes, and outright hysterical.
For a while now, James has been washing his hands at the island sink instead of the main sink. We have a little white chair, toddler size, that butts up to the counter so he can climb up and reach the faucet, soap, etc. I now have a 19 month old daughter that wants to do the same... and she even goes to the pantry to drag the chair (after I have put it away to hopefully discontinue her repeated attempts to wash her hands) back to the sink. She is a stinker, and she's smart!
Today was no exception, and she climbed up on the chair to play with the faucet (it's a stretch to say she's washing her hands). I think I probably told her no and got her down once, and then she did it again. I got her down again, but this time picked her up and held her. She then told me something along the lines of, "Hands! Want!" and I replied with, "No we're not going to wash our hands right now, and I don't want you to make a mess."
... THEN she said, "WHY?"
ARE YOU KIDDING ME? She's 19 months and already asking why?
I said to her, "It's messy and I don't want you do do that now," and then she made me laugh with a pathetic repetition of the word "please?". Even Nathan cracked up, and he was in the next room. It was hysterical. I wish I remembered the exact situation as it played out, but I inherited my mother's memory problems. :)
Kaitlyn also likes to go to the dog and cat's water bowl, stick her finger tips in the water, then put them in her mouth and say, "mmmm". SICK. I try to get there as soon as I can to keep this from happening, but sometimes I'm too late. Today I tried to scold her (very gently of course) and told her, "NO! No, no, no!" and she just looked at me and laughed like I was playing a game. Awesome.
What age can you start the naughty step technique? :) Ha. I've got my work cut out for me with this one!