Recently I started bathing The Boy in the regular tub. I've been putting The Boy and The Girl in the bath together, since I figured at least for another year or so I can get away with that (and it saves on the water bill).
Then suddenly he stops. He pulls himself up onto the side of the tub and tries to get out. Apparently, he is not interested in the bathing part of the bath.
Yup, he's definitely a boy.
(The photo is a stillframe from a video I shot of his splashing, thus the poor image quality and general blurriness)