Apparently (and I have of long suspected this) women don't realise when they are sexually excited.
Now, to a man, this would seem to be impossible. How can you be sexually aroused and not know it (even without the obvious physical indications?
) 
It is still not clear whether women never know that they are sexually aroused, or that they don't always know.
The whole thing sounds bonkers to me. 
What I did already know is that women can switch sexual arousal on and off in their brains*, whereas men can't do that so easily (if at all
). Whether this is linked to the lack of knowledge about their current of state of sexual arousal, I am keen to discover. For instance can they switch sexual arousal off if they are not aware whether they are sexually aroused or not? Male members must now stop and consider the far-reaching consequences of these important revelations.
To this end, if any naked lady members would care to assist me with my important research into these vital matters, I would be most pleased for them to contact me.
I cannot believe that, in this modern space-age, we do not even know the truth about these basic human matters. Four billion women on this planet and nobody has even bothered to ask simple questions.
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* But they can only switch it on if the stimulus exists. So the stimulus must reach the brain via an on/off switch
It occurs to me that the same switch could be utilised to switch the arousal sensor on and off (if it was a 2-pole switch). This would save on components. 
