The Frog's Journey to the Tumultuous River

A frog came to a large tumultuous river. He could not swim across it because he was too tired from walking every day. The turtle helped him cross the river, but his back was very wet and easy to fall off. So did the frog have a strong position on the turtle's back? No. But that implies that the princess is probably human. And this surprised the turtle. Did the frog directly say he wanted to marry a human? No, he just said, I want to find a princess. It indirectly said he wanted to marriage a human.