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Guy

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發表於 2014-1-5 20:08 | 顯示全部帖子
If sexual-health is a school material, then it has to be graded into multiple levels for different age.

You can't teach a first grader about calculus without having him thru the simple and standard math.
First law: Every body remains in a state of rest or uniform motion unless it is acted upon by an external unbalanced force.

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