Blue Veined Throbbers are erections so intense that you can feel your unit throbbing and you can see the veins bulging. Just stimulate yourself and try to make the hardest boner you ever had and keep it like that for 5-10 minutes and that should be close enuff. I will post a link as well, good luck. HT.
http://www.pegym.com/forums/beginner...html#post11918