I am only stretching about 8.6 hours average a week sometimes a tad more if I get time Sunday to stretch. I use the Bib starter I tried doing the 10 hour a week and my penis would turtle and I had no night/morning wood. At the current 8 or so hours weekly I have great erections and night/morning wood too. I also am gaining faster with less hours everyone is different I do not think everyone should follow or attempt 10+ hours for me it was a negative impact. This was tried after hanging/stretching for over 3 months I did 10-12 hours for only 2 weeks and went back down to around 8. So far 1.125” gain in 4 months.