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Ok I noticed last night that my PC muscle, or prostate one, flex when I am erect and I touch my penis. It’s like it will be relaxed but when I touch or stroke it, I feel it tighten a bit. And if I continue to stroke my penis, it stays tightened. Is this normal?
Probably this one: Locating the bc muscle.
The contraction of this muscle in response to touch seems normal to me.
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