Two area men are about to take the adult side of adult colouring books to a whole new level.

Co-creators Connor Thompson and Chris Elphick are putting the finishing touches on their new colouring book called Cockadoodles.

Yes, it is actually a colouring/activity book that's full of penises.

All of your favourites from childhood are here — from connect the dots, to mazes and even a crossword puzzle. They're just much more phallic this time around.

Thompson told CBC News that the book took "hundreds of hours" of painstaking research.

Friends and family didn't really believe us when we told them we were making a colouring book full of wieners. - Connor Thompson, co-creator

"I've seen a lot of things," he said. "My Google searches are very questionable."

The project started out as a joke that Thompson made to his girlfriend at the end of last year, when he said, "adult colouring books aren't actually very adult."

Thompson, who is from the Niagara region but now lives in Hamilton, then mentioned it to his buddy Elphick, who still lives in Niagara. The idea blossomed, and the pair, both 28, decided to make a real go of it.

"Friends and family didn't really believe us when we told them we were making a colouring book full of wieners," he said.

But there were some roadblocks along the way. For one, Thompson didn't actually know how to create and draw digital images, so he spent hours at the Hamilton Public Library doing tutorials and brushing up on his art skills.

When all 32 pages were finished, they ran into another problem: no one actually wanted to print the thing.

"We figured if we were paying a printer, they wouldn't care what the book was," Thompson said. "Turns out they do care. They care a lot, actually."

The book includes a crossword puzzle, connect the dots, and more. (Cockadoodles)

It took ten tries, but they did finally find someone who was willing to print the book — and in turn, the duo became like urban legends in the company's warehouse.

They created an IndieGoGo campaign to gauge interest in the project, and have thus far raised just over $1,500. They plan on doing an initial run of 1,000 copies, and are making sure to get them out in time for Christmas.

Chris Elphick, left and Connor Thompson created the adult-themed adult colouring book. (YouTube)

"It's a great stocking stuffer," Thompson said with a laugh.

Adult colouring books emerged as an international trend last year. Amazon lists dozens of titles for sale, and some titles in the U.K. have sold tens of thousands of copies, according to The Guardian. The books made up nine of the top 10 "most wished for" books on Amazon.ca last November.

While many of these books are filled with spiraling, intricate patterns, Cockadoodles is much more simple, Thompson says.

"This thing should be coloured in with crayons."

adam.carter@cbc.ca