I am brand new at Penis Enlargement'ing, and am doing about 30-45 min a day jelqing and stretching. However, since I am at a computer a lot, I do BTC (sitting on it) for hours at a time. I stop and "shake things out" periodically to keep the blood flowing. I reposition my penis and restretch periodically also. I am in no discomfort at all while doing this. Is there any problem with sitting on it for long periods like I am? Could doing this one exercise for many more hours than the other ones cause an imbalance of some sort?