I cant Imagine its difficult for most artists to draw a large penis, even in great detail, Id say go with a walk in :mamoru: HaHa seriously though Most places I think you can just go in and they will help you draw up your Idea
HOD really impresses me every time I go there. Generally, you make a consultation appointment to talk about what you want and then when you come back the artist will have one or more designs for you sketched out. Pick one and saddle up… I haven’t been charged for the consultation or artwork, but always tip well.
HOD or Divine Machine, both do amazing work. Definitely sit down with one of the artists and talk about what you want to do. You may want to offer a small deposit to consult with the artist and have them make a drawing for you. They will usually count the deposit toward the price of the tattoo if you decide to have them do it.