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I used to sleep with this one girl a lot (non sexually) and I don't ever recall feeling any vibrations in her as she fell asleep (she always fell asleep first) What causes the vibrations that many people claim they experience during sp? it must be muscles, right? so shouldn't they be observable to the naked touch? Tch. Naked touch. Links? thoughts?
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Sometimes (at least in my experience) the muscles will spasm, but I'm fairly certain the vibrations do not come from the muscles themselves. I think I heard somewhere it has everything to do with the nerve impulses your brain is sending out to your body.
Besides, I doubt my muscles could vibrate like that anyway. xD
