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Oh yes they do! BUT this particular saga is so absurdly funny because Goku hands a senzu bean to Cell who (even without a Senzu bean is massively powerful) ends up beating his son to a pulp. Good old Goku being Goku.

They should make a father of the year award for him. Or maybe it just shows how much he believes in his son. Still a dumb move.

Haha. Piccolo should get 'Father of all time' award by proxy!