I never thought much about it.... thanks, now you just added to my C&V bicycle/recycle paranoia. My guess, and it's just that, is that the artist used whatever bikes they could most cheaply obtain (that's what my artist friends seem to do with other "found object" art). That means possible dealings with friends and neighbors, recycle centers, landfills, scrapyards, etc. And, we've read the stories here, with eager eyes and lustful hearts, of great acquisitions with these same Bicycle Penthouse Forum origin stories. I realize my passion to save vintage bikes outweighs that of 113% of the typical persons out there; so my policy of "no bikes should be sacrificed to art" probably doesn't match that of John and Mary American.