Heavy spoilers so please only read on if you've finished Act 2 or at least the part regarding Chalice of Metamorphosis.

First riddle: I'm no vampire but blood I do drink; I'll frobid you all though law I'm not; Even if you love me nothing you will gain; But if you betray me I'll give you much pain. Who am I?

Answer is wife but what the hell?! How is that related to drinking blood but isn't a vampire and what does this mean "even if you love me nothing you will gain."

Well the main priest ( the one who put all those riddles up in the first place) was a bit of misogynist, that's all ;)

Lighten up, Swedish guy. It's a joke based on the preconception, that a wife will always turn your life into living hell.

Yeah, I assumed it was something like that but it was so confusing when it was related to sucking blood.

What about the part about love and gain nothing? Please explain.