The Shine being a mostly psychic type of magic gave no base for hesitation to give blood. Dan assumed that would make for a stronger connection between him and whatever item she was making. Yenn did not come off as some terrible evil out to control people. She had offered her help, and anything that was not going to put his soberity at risk was better than nothing.
The flashes of her tawdry romance novels were also purely amusing him, though he kept it to himself. They were brief glimpses and he was not sure entirely the context of the thoughts as he was not trying to invade her privacy.
"Oh. Well, if you ever want to learn more of my world, I don't mind talking about it." He paused with a thoughtful szmile to himself. "It's more difficult to not speak on it here than back home because of Abra and the fact that a different version of me had been here previously. My secrets are not so secret anymore."