You know, if Sephiroth ever had a documentary about his life done up, they'd definitely have some great material for the old "Child who grew up in a messed up family and ended up a messed up bastard" routine.

See? You can't blame Sephiroth for what he did, it's his parents, that's the problem. Let that be a lesson to everyone. Be a good mummy and/or daddy or else your kid might end up just as messed up in the head as Sephy was.