You're the second person to make the nipple comment - you definitely have your mind in the right place :)

For the typeface, I'm trying to hint at the meaning of the ideas with the words - which may be a mistake. The stream being more "fluid" and wider, the focus being precise. We'll try it with the same font to see how it looks too.

Good point on the lead in tail - that is a problem with the font - but I will definitely fix that.