Just b/c someone tells you something, doesnt always mean its true. Do some research and you'll understand why test should be the base of every cycle. All steroids shut down or surpress you natural testosterone levels to one degree or another. Deca shuts you down quite hard and quickly and has even been used to chemically castrate sex offenders, but thats besides the point. With no test in your system, you put yourself at a high risk of sexual problems, lethargy, etc. Test is what made you a man and there is no substitute for it IMO