Have you ever felt a quivering in the groin?

My prostate has quivered before. Like a shiver. I never thought about what muscles caused it. It doves feel good.

@dunz, I am a bit confused, do you actually have an Aneros. If you do it would be helpful to know which model so we know where you are coming from. If you don't have one I suggest you purchase a mid size one (Helix SYN) and make that your reference point for your posts.

I have 2 peridise.
But when this quivering happened I was only using a small solid vibrator anally it also wasn't inserted very deep. But I felt some kind of strange twitching in the groin region. Can the vibrations from a vibrator be so strong that you even feel it in the groin?

I was "wearing" out and about today, and had a long, protacted, "flutter" down there. Once upon a time, it would have freaked me out, but now, I accept such sensations as gifts.

I think the prostate can pulse but not quiver...I have felt it pulse or throb in the rhythm of my heart beat on several occasions which is very nice. The anus muscles can produce a quivering sensation almost like a rolling wave of pleasure. I once had at least 30 minutes of rolling anal pleasure. The anal orgasm is so good.... I rank it close to the top of any orgasm and I wish I could reproduce at will.