Im on my 7th day of Dbol Test E. Have noticed my testicles have already shrunken a bit. My theory is that since the testicles are shutting down production blood flow to the region is reduced. I say this because my all day flacid size has decreased as well. People see their flacid getting smaller and just assume their dick is shrinking. Maybe that's the root of the myth? My erect size is still the same so I no its not getting smaller.