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 am a kind of coat that can only be put on when wet.
If you look, you cannot see me. And if you see me, you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I?
Squeeze me and I cry tears as red as my flesh but my heart is made of stone.
I am the kind of dog that chases anything red.
The answer I give is yes, but what I mean is no. What was the question?