In fact, there is a woman almost like vampire, called Mitchell. She is a Tattoo Artist in America.
On a TV show called <My Strange Addiction> interview Mitchell. And on that show, Mitchell said she has a very strange habit. She said she need to drink almost 1 litre pig blood. She said when she was young, she have already had this special habit. Sometimes she just put blood into a glass cup to drink it , sometimes she likes to cook some food made of blood. Also she will put blood and other food toghther to eat it. On the Show, she said drinking blood is as important as drinking water. One day she don't drink water, she will feel unforcomfortable and has bad mood. She likes drinking blood when she is reading book, watching TV. That was similar as normal people drinking coffe or tea when they are doing that. And at last, she said blood give her passion and full of power.
If you want to see a video about it, just click this link.http://video.sina.com.cn/v/b/99571107-2214257545.html