@slavejr2 Great demo. Looks really exciting and enjoyable. Iβve been doing the same thing training my hole to expand for larger dildos. Couple of years ago I struggled with a 5 inch slim dildo. Now with training Iβm taking 11 inch easy with thicker circumference. Working on larger ones.
There are two ways of BC with the adapters. The right one lets air out and left gradually reduces air intake.
If I block the left one after letting air out, it becomes tighter breathing. If I block the right one allow air in, fills like a balloon. Then stop both to rebreathe air