*Smacks Rilke on the head* Be nice :p LOL
Heani I doubt if Galen is suggesting that he drinks blood. In fact I think he's mortified at the idea of it and believes people would die if they did.
Medically speaking, there are many things in blood that can affect you if you drink it. There are red blood cells (rbc) is one of those things. Now what is the first thing that happens when you drink something, anything, whisky perhaps? It goes straight your stomach. Your stomach is not built to digest blood, largely because of the RBCs. Once your body detects them in your stomach, it thinks that there is some sort of internal bleeding. So in all likelihood the first thing that will happen to you is that you will throw up.
The second thing that is in someones blood is what you would call someones immunity. They might not be sick, but, for example, if this person has had strep throat in the past it never leaves your body, so there is an 85% chance that you will get strep.
And God help those who drink blood of someone who's carrying HIV.
On saying that if you cut your finger and put in your mouth as a reflex, and end up drinking a bit of that blood, I promise you that you will not die :-)
Love and light... (Lots of it, light especially) LOL