I can tell you from experience that at he very least I can close to having my cervix penetrated. It's a very intense and painful feeling followed by a euphoric orgasm. He was over 11 inches long and very thick which is probably why he never made it into the opening. I admit I love having the cervix bumped though.... makes me wet just thinking about it.
The orgasm is amazing huh? I ha.d to google it after my first few. It's called a cervical orgasm, and I almost pass out from them. Once I've had one though it does seem to make my cervix open more for him. Then when he cums he is able to put the tip of his cock head in the opening, but not penetrate it and then cum. Guess that's why I don't leak afterwards
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