This is so weird to ask but i need to know. Since i've been younger i've been able to contract my abdominal muscles in a certain way and 'down there' would start this quick 'thumping'. Of course back then it was nothing sexual, but now it's like i can think of thoughts that turn me on and reach o****m (im still a virgin though, so i dont really know if thats even what is it??) It's like a very quick thumping in my v****a, and please only serious answers...im not some perv, im just confused.
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