While Astrid Jutte tests do show a increase of mens
testosterone levels by 130% to 150% in saliva tests when exposed to copulins. They never really delved into how much was needed to do this.
I suppose on a man if you wear a drop or two it should be enough since the smell will be contained to you. I know that some men have reported just using one drop under there noses and experiencing erotic dreams and more frequant erections. Not sure if the dreams caused the erection or the copulins.
Here is a post by 3 of the most experienced, respected, knowledgable men on the forum. I learned alot about pheromones from their posts and experiments.
Sigma, Catlord and Dancing joker discussing cops worn by men. …
Hope it helps discover some of the anwsers to your question, 
Tisha