It stands to reason that in love-making, on the surface at least, it is the woman, 'the penetrated one', who holds the vulnerability. After all, having a man push himself into your most sacred and sensitive opening is about the most surrendered and yielding experience one can imagine. So it's understandable that while women are in the 'receiving' role sexually, and are also usually less physically strong than their male partners, the vulnerability is held by the women.
A stirring read. Bravo.