tapster: Max
You are right I have to have some blood in there before I can get in, that is if I can get in at all. One disdvantage of a huge dick is that some girls won't let you get near them. It does take a while for me to get hard anyway, so often I dangle around pretty full of blood but not up yet. In that state I can get into a girl.
Yes, I have been to a urologist and I am probably one of his favourite patients just for the curiosity factor. I try various things to excercise my capacity so not to loose it, when I have time.