Well, somewhat anyway. With CursePenisGrowth.

Before listening to the file regularly with proper inductions and trance and whatnot, the tip of my penis would extend up to the middle of my belly button when fully erect.

Now, the tip extends slightly further than that, about a quarter inch higher than the upper limit of said belly button. When fully erect again, of course.

This is measurable evidence that hypnosis will work, and has thus greatly boosted my confidence as such.