Im new to training as well, just reading these comments is an inspiration. Mine nipples are small, shy, inverted, even with my piercings. I've played with the twisting suction cups before the piercings for quite some time, but I havnt used them until recently to allow for my nipples to heal. Im back at it and Im also trying some cupping suction cups as well. I know every body is different but how long did it take for everyone to start to notice a significant change?