In the Gerudo school to teach their women how to handle men, (err... secrets of love or so, use your abdomen muscles for, err... whatever...? ^^), there's a little extract of a map at the wall, which shows a blue heart. It's a reference to the heart shaped pond somewhere in the southeastern mountaneous parts near the fisher village. You'll find a Gerudo a the pond and a youg male Hylian across the pond, looking at each other, whom you can bring together by doing a tiny "courier" quest. They'll thank you and the male will give you a couple uf rupees, only to be shouted at by his new Gerudo better half whether that's all she's worth to him. Upon which he'll prompty hand over another 100 rupees. It was a pretty comical carricature and very charmingly done. Was having a good laugh at the quest with my better half. ^^