I had to jump in on this one. I have a very good example of Tren for you.
Without Tren you might consider it a good idea to pull your woman's hair when you take her from behind.
With Tren you are convinced that punching her in the back of neck to make her convulse while giving her the first ever anal experience as you take her from behind is a really great idea and it will feel so good, putting it up there with one of your best, good ideas.
Subtle but important difference on the effects of Tren.
Thank you,
Syn