Andropause in a 27 year old?

I thought this (male menopause) only happened to older guys, but he has all the symptoms. He went to a urologist once because of erectile dysfunction and (without any tests) was told his problems were all "in his head". He was very discouraged by this (and frustrated!) and I've managed to talk him into seeing a doctor again. He wants me there to talk to the doctor as well. What can we say or do to make the doctor take us seriously and really look into this? And what should the doctor be looking for?