OK, this is kinda hard to explain but I'm gonna try... I have two types or erection sorta, the most common one is hard. It feels like my dick is made of a cork or something. My second type of erection feels more like my penis is "full" of blood and is hard from the pressure of so much blood. Its hard to explain but I'm sure some people know what i mean. Well i usually have the first type of erection, and erection #1 doesn't really let blood move around so when i try to jelq or supra slammin I feel it but not so much. When I have erection #2 i can jelq and it feels like its working alot and the supra slammers are very intense. I don't know what wrong, hopefully somebody had it and found out how to change it but if not I'll deal with it.