"A guy who is a major tool, and is also slightly metrosexual", "tool" meaning "One who lacks the mental capacity to know he is being used. A fool. A cretin. Characterized by low intelligence and/or self-steem."
Well, I hope we can dispel that. Just as we have worked hard to discard the meaning of "gay" when it took on negative connotations. Cock has often been referred to with the word "tool." But tools are good things; they can help us accomplish more than one task.
They're quite enjoyable and fun to use, if handled properly.
Go ahead - enjoy your Magic Wand