If the partner's Sikel increases in size- this gives an additional clue when searching.
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How to inspect the Sikel, what does a man need to see and how to do it?
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To change in size, Sikel does not start immediately,
but only half a minute after the start of stimulation.
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To detect the Sikel, you need to spread your fingers out with your fingers
and sharpen your attention at the place of their contact.
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The word"Sikel"(you already know the meaning of the word)refers to the Old Russian,
it is found even in the Novgorod chronicles, when they used birch bark for them.