For variation, the woman can even lie completely flat, face down on the bed with her legs open, as her partner lies on top of her back, entering from behind.
如果要有所变化，女性可以完全平躺着，面部朝下，双脚打开，由趴在她背部的伴侣从后面进入。
How it works: Lie flat on your back. Hold the book above your head and read until your arms are sore.
怎么做：平躺下，仰卧。把书举到头部上方看，直到胳膊酸痛。
How it works: Lie flat on your back. Hold the book above your head and read until your arms are sore.
怎么做：平躺下，仰卧。把书举到头部上方看，直到胳膊酸痛。
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