Progress check

In my latest session, I am experiencing some pretty intense contractions especially around the pelvis and abdominal regions. They come in continuous waves and sometimes they can occur up to 3 times consecutively. I don’t derive much pleasure from these contractions though even don’t these contractions do make me buck around like what you see in the videos.

According to the aneros wiki beginner milestone list, it seems like I’m at the large muscle quaking stage. Is this the case?

Any helpful comments will be appreciated! Especially on what can I expect in future sessions.