for starters we each takes out our knives and nicks our left thumb to draw blood and then puts all our thumbs together so that we are blood brothers just like the savages , but tink do n't think it 's enough for such a dread brotherhood as ours and why do n't we cut off our right earlobes and sew 'em all in a packet and send it overboard with a note to neptune , which makes me sick but i say nothing , and davy pipes up with , `` why do n't we all get the same tattoo when we go ashore ? ''