originally posted on Too Much to Declare

You look pale, son. You better go and suck some blood.

I'm not a vampire, dad.

Don't try and be clever with me. It's in your genes! Your mother and I have always been regular users, as you well know. It's all we've got in common.

That doesn't mean....

Oh, shut up you silly veggie-pandy! It's dark now. Why don't you fly down the road and get your fill from the Robinson girl? It's rhesus positive.

Rhesus what?

Or whatever. I was never good at blood groups and stuff. But it does taste good.