Answer:
As I went over London Bridge I met my sister Jenny; I broke her neck and drank her blood and left her standing empty.
I may be made of metal bone or wood and have many teeth. My bite hurts no one and the ladies love me.
If you lose one of me, you are upset, bewildered, and perplexed. If you lose two of me, you are blissfully unaware. What am I?
Things here are usually tagged with red stickers.
There was a girl half my age when I was 12, now I am 66, how old is she?
I stay where I am when I go off. What am I?