Aneros keeps popping out

I haven’t got much out of the aneros yet but as per the advice here I am persisting. I think I’m progressing nicely, albeit rather slowly. The last few sessions I’ve had a problem. The best move I can do is pushing it out and sliding it back in again (no hands touch the toy, of course). This feels fabulous and I was starting to feel warmth in the right place. But, about every 3 pushes it pops out and the rhythm is lost. Are my lack of experience and muscle control causing this problem? Or should I buy a different toy. I have the helix syn. Wouldn’t a bigger one stay more firmly inside?

Helix Syn Trident sold out. How about Progasm Jr?

Thanks for all the info, tips and reviews in this group. I’m buying my first aneros now.

PROBLEM: The Helix Syn Trident seems to be the most recommended for beginners, at aneros and most other places. But it’s sold out or not being shipped to my country on amazon.com. At the aneros website I could buy it but they’re charging $35 (non US) shipping! At amazon.co.uk it’s also expensive.

DILEMMA: How about the Progasm Jr? Is it similarly good for a total beginner like me? (BTW I’m skinny too, 30″ waist.) Or should I pay the extra money for the more recommended Helix Syn Trident?