where does the stuff on purgatorio come from?

Marc of purgatorio fame when asked, "Marc, seriously, where do you find these things?"

"A lot of people ask me that question and basically the answer is the same. I think of the stupidist thing I can and do a Google picture search. Low and behold, I find something almost everytime.

"The other great place for ideas is just taking a stroll through your local “Christian” bookstore with a notebook."