When I'm out with Nova he talks openly about this with whomever, this is generally the pattern; first off they find it absurd/odd/creepy, they then witness the results for themselves and they are intrigued, some then want to try it for themselves, the vast majority fail because they aren't prepared to put themselves out there and put the graft in, they then rationalise their failures/fear as 'oh it was weird anyway' to protect their pathetic ego's.