My penis is 8'' long and 5-1/2'' around. My erections are always rock hard and I have what appears to be a tight tendon on top at the base. It makes my erection stand straight up and it is uncomfortable when pulled downward. This makes some sex positions uncomfortable. Is there a way to stretch this tendon? I have tried with no luck. Can this tendon be cut? It seems my penis would extend even more if it wasn't held in check by this. I see on this site really big erections that hang downward. Mine would never do that. Any suggestions?