Yes it really is the things that makes most sense. CotBP Jack would not abandon his baby to anything. After all, he DID leave her, and then came back. I believe it's the one moment in DMC that his compass pointed straight, as it did for those ten years as well. To the Pearl. And the way he's walking around touching her and looking lovingly at her, as Lizzie approaches him.....

As for tickles, have at it, my dear! I bet the bottoms of his feet are a real spot. Thanks for the comment!