Further to my suggestion that some sort of fertility ritual may have been part of the kings chamber function, and specifically with the chambers south shaft opening .
Browsing through Peter lemesurier,s book "The Great Pyramid Decoded" i came across a diagram of the first few feet of the south shafts opening.
I cant help but notice that this first section has a womb like shape, Lemesurier makes the same connection as to this aspect.
The Kings Chamber South Opening.
Were they in some symbolic way trying to mate with their Gods ?.