To be in a pump feels strange at first, kinda uncomfortable, but that goes away rather quickly. As long as you keep your pressure low and pump sets in a small time frame you will not get a donut effect, nor will the pump pressing agianst your pubic bone hurt. As far as I'm concerned pumping for me has been the best thing for my girth and flaccid size. But everyone is different, my cock might not respond to clamps, while some others might. While my dick hes responded to pumping. And vice versa! Remember Penis Enlargement'rs find somethinf that your cock responds too good. I never limit myself to one routine for too long, unless I'm seeing great results. Cause I know if I switch it up every 3 to 4 months, my dick will be subjected to something new and wil respond to it!