I’m guessing 20-25mcg of TAF.
I suspect that what you perceive as focus is lack of habituation, so you continue to attend to something/someone which you might otherwise lose interest in. I don’t think it would provide a helpful focus for doing math, for example.
One of the best TAF examples is Mark’s P100-TAF house cleaning formula:
And it works for pornography.
Playboy and Penthouse put out new magazines every month because by then one is ready for new material. With TAF the old stuff is still exciting. (Works with on-line porn as well.)
It’s harder to do the same experiment with people because, unlike still photos, people do change. It’s like that saying, “You can’t step in the same river twice.” I do believe that women who were just about burned out on Warren have had their interest piqued again, by TAF containing mixes. I have not, however, had the acid-test “opportunity” of trying to win back an ex.
I also remember that when I was getting massage therapy regularly, I could spray some TAF on part of my body and when the masseuse would get there she would just stay there and massage that one muscle for the rest of the hour and then be shocked when time was up!
This happened several times on several different muscle groups.