i dont know either. but for some reason when i dont ejaculate at all in a certain period i make amazing gains specially in length. I'm not sure if it's accidental or not. I hope its not, right now i've started a 30 day 'non ejaculation routine.' I find it a good self decipline thing but what's certain is that its very good to be able to make quick gains while refusing pleasure for 30 days...