"Knowledge is still knowledge. I really do appreciate the information."

Leeches being turned into pills. Leeches used to prevent blood clotting. Leeches were a fascinating subject for him right now and he wondered how many other uses that they could have. Were they still in practice with Human medicine? He knows the demons use them here, but he isn't certain that modern medicine continued with the practice.

"I wonder what other creatures humans used in medicine. I'm afraid I'm still learning about different animals native to Earth."

He was familiar with dogs and that was about as far as his familiarity with Earth animals goes.