New Experience - Question

Hi All,

I am about 1 month into my  journey and I have had a few very interesting experiences so far.  

I would say there have been 10 or so non eventful but (still relaxing) sessions. In the sessions that have been more eventful ALL of the eventfullness has happened in the first 5-10 minutes. 

Using a similar approach each time, I get relaxed, and do some deep belly breathing with the Aneros inserted, proper lubrication etc.  

From there I do some tighter squeezes, and slowly release to find that sweet spot. I can tell by my heartrate in some cases and that more rapid heartrate usually accompanied by some pleasurable deeper "penetration" or so it feels like that at least.  

From that point in each of these 3-4 sessions, the breathing becomes more rapid, and there is a massive erection and with no contact from me in terms of touching. There are some wonderful little orgasmic feelings (in the penis area) and that "erection" phase lasts for 2-3 minutes I would say.  

At that point this all seems to subside. I do a reset, and go right back to it, same approach and all. In each case, even with another hour or so spent, the results do not repeat in that session. 

So my real question is, once I have that VERY positive experience, should I just accept this as the session duration?    Have you had similar experiences, and how do you keep those feelings growing? 

I am not saying the erection is critical, but it seems that when that happens A LOT happens with it. I do find it harder to keep that sweet spot squeeze with a massive erection, it just gets lets sensitive for me and it's harder to feel what level I am squeezing at (usually (20-30% strength does it.)

Thanks in advance all!