From what people have told me on here, i wouldnt mess around with getting Deca dick. Might as well be safe, and get better gains and run it with some kind of test too. Propably sustanon or test E.
I know people who have and have been fine. I know people who have and we're unable to get a sustained hard on up to 2 months after stopping. It really just depends on the individual. Nandrolones are a little difficult to recover from. Your buddy might want to throw in a little test w/ it. Maybe 250-350 mg a week....