If I search for "young babysitter" I am searching for a babysitter to have my way with lol. So the results are somewhat targeted you see... Otherwise I'd search for "experienced babysitter" or something. "Young experience babysitter" should show me results of escort companies, obviously. hahaha
Seriously now, you can realize from the results that usually most people who search for "young babysitter" want porn. Google can detect that based on users search history and other means. It could be an exploitation from the xxx seos but I would not bet on that.