I know what you mean. when i first pumped it was really great. the more i pumped the more my cock was accustomed to it, and I got bigger results each time. the first time, it felt really stretched. the 2nd and 3rd times it got bigger without a tight, stretching feeling. I think you will see these same gains each time you pump. I am not an expert, but it has really shown some impressive results when I take an evening to pump. check out joshunot, he's a pumper with impressive gains. Robert