Which is good because it gets into what Dumbledore wanted. As you say, who wouldn't *wanna* be seduced to the dark side at this age? It's not like he fell in love and it was all just Gellert leading him astray--presumably Gellert was being led astray as well. I mean, even if he stuck with it, presumably the two of them were caught up in it together then. If Dumbledore's sister hadn't died he might have stuck with it too.