I have mentioned this in other threads. My first cycle ever was a deca only cycle ( along with a buddy that did the same) we bascially had no fken clue what we were doing obviously. I never had any issue with Deca dick whatsover and either did he. I was banging my girlfreind at the time about three times a day ( poor girl ) My libido went through the roof. This was a ten week deca only cycle. That was the first cycle mind you. The second time I did a deca only cycle it tookk about six weeks in and than I started to have some problems with over all sex drive, but still did not have " The so called Deca sick problem" So thats just my two cents in that issue !!!