Here's a link to a couple of fairly easy to understand but technical enough description of the mechanics.

http://www.caitlainscorner.com/content/view/155/59/
http://www.sexuality.org/l/sex/dsmansex.html

Larry, the best item to use to combat shrinkage and to help in penile recovery is a good medical grade penis pump. The pills are fine for the blood flow and tissue infusion, and the pump will really help to keep the penis 'exercised' by engorging it with fresh blood, expanding the cavernous cavities...

Rob, sorry for being obtuse about it. I thought that guys reading it would figure that it's not exactly legal to get import drugs in the US by mentioning the Customs interception of any of the generic's. the legality of them getting thru customs is another story. Yes, you are right, all of them are ...

Rob, many guys I know who are battling ED from prostatectomy use http://www.alldaychemist.com. There has been no reported problems with safety, effectiveness of the drugs and such. Generic Viagra (sildenafil citrate) is available there for .54 cents or so per pill, after the 2 for 1 deal. Shipping i...