Bw just cause you read it in a book don't mean its right. Did you also read about the gains you got. Just relax we are all bros here. It is alright to disagree.
I would rather do a just test cycle, but that is me.
Ant your friend who gained 20 on 100mg a week is freak of nature if what he is telling you is true.
Just deca you better break up with your girlfriend to avoid the embarassment.
Good luck with whatever you decide Bro.