Deca Dick is something you get AFTER your cycle, not during. And it's a result of Deca shutting down your testosterone production.
For the person who asked with it is... It's basically limp noodle syndrom that can run from weaker erections to complete impotence until your natural test production restarts.
If you follow up with the proper HCG and/or Clomid dosages at the end of your cycle to restart natural test production, bouncing back from Deca shouldn't be any harder than your individual response to other varieties of AS.
This crap makes me wan't to puke. Any steroid that shuts down natural testosterone production can cause a limp dick. Not just deca, any steroid. Depending on how sensitive you are to the drugs. Use HCG in your cycle at about the six week mark. with clomid at the end of your cycle you will never have any problems. Deca is a great steroid period.