My cousin is in week 7 of a tren ace only cycle, and he tells me that he has never been hornier. And it is legit strango tren, no knock off. I think fina really works differently with different folks. Obviously test is recommended and beneficial, but from what I have heard from people in my real life circle (as opposed to what I read on the internet), fina dick does not exist.
That is what has been told to me by 3 different guys. 2 of which were running prop with their tren, so they would have no reason to get fina dick, and the other, my cousin, is running nothing except tren ace @ 75 mg ED, and some letrozole.
EDIT: I am NOT speaking from personal experience. I have never done tren. However, I will take the plunge into that golden yellow abyss of oil this summer (with test prop... because regardless of what my cousin and buddies say, I don't want fina dick. Being an addict of vaginal plundering, sex is way too important to me to even go one week while adjusting my prop dosage to get my thing working again. No thanks. I will personally start with a higher prop dose than my tren dose).