Dear Y&Y,
I am seeing this as actually something very deep, mystical, spiritual... Also, however, profoundly connected to who we are as women, primal, instinctual and Earth-centered.
I dealt with all this kind of thing in myself by studying the Swiss psychiatrist Carl Jung, as well as folks like Joseph Campbell...
The act of love-making, on the archetypal level, represents our mystical Oneness unifying, unity with each other and all of creation. And we experience that spiritual Oneness most clearly with a beloved spouse...
Women and men ARE different...right down to the soul level...women deeply spiritual connection to the Earth...the mystery of child-bearing...
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You are on the right track, I believe, looking for some understanding of what is happening with you instinctually, and then use intellect for rational decisions as to how to handle it.