When it comes to men, she prefers brains over 'brawn'. [=she likes smart men better than muscular ones]
his 'brawny' [='muscular'] arms
(..) And hail Ragnar's beard! I want you to teach Lord Egbert our customs. I'll teach him. Remember, I live by brains, not brawn. Yes, my lord. Then fetch him a horse! -Now? -Why not? Einar! Gently, gently. I know. Brains, not brawn. He's got to draw us maps of the English coast! What man ever had a finer son? Odin could have sired him. But I did. (..)1958 The Vikings