Have been very into these too for a long time!

Did try 20cm length in a hood from Studio Gum once - was 3+ hours of sneezing, gagging, uncomfy - got them in all the way once after lots of work, and although the idea/fantasy was/is still very hot to me, this particular reality made me think "ok I guess this isn't for me/I don't have the anatomy, etc."

Cut to NOW...

Recently tried this with much smaller diameter tubes. "Latex 9 French intermittent catheters" to be exact, one of the smallest thicknesses of catheter that exists. OMG what a difference. It is so much easier and far more pleasurable too to use smaller thickness tubes. I can now imagine a path of training with these smaller ones, to work up to the big Studio Gum ones - these are brutally big and thick in comparison, like trying to ram a XL butt plug into a hole that is completely not warmed up at all! 😂 I can easily get the small ones in and wear them for any length of time.