I think IID porn is pretty common, actually! My device uses the blow, then suck back method. In the first week or two when I was getting used to it, I had lots of “blow harder” or “blow softer” messages. But my favorite was the most common error I had, when it would tell me to “suck longer”. That is the only redeeming thing about the device, the comedy it provided with it’s dirty, dirty talk.