hey, if there was nothing the baby could do to stop them, and the baby did to enjoy it (evidenced by crying), then baby jesus was not sinning by being masterbated. So your figiveness of sins is still safe.
That was a close one, though. If he had sinned, his sacrifice could not save us. Good thing Jesus knew right from wrong. Imagine if he had grown up somewhere where people were not taught sex is a sin. Would God hold him accountable? It depends if Adam and Eve eating from the Tree of Knowledge of Good and Evil makes all of us accountable, or just them.