I've been reading up on how the other women here feel along their vaginal walls along the rim and/or sides of the cup to make sure it's opened. I have no idea if mine has opened properly or not. I don't think it ever "popped" and I can't make my finger fit between the sides, let alone the rim, of my cup and my vagina walls. How do people manage to stick a finger inside themselves all the way to the rim once the cup is inside you? My vagina is crying thinking about it. I'm using the punch-down fold, FWIW.