The care that Black put into his sheets does not, of course, explain why they were bought and used. Not all options traders believed using sheets was necessary. The options trader Blair Hull reports that he was mocked for using them. Fellow traders "would laugh at you and try to intimidate you out of the pit, saying `You're not a man if you're using those theoretical value sheets.' They'd take your sheets and throw them down on the floor and say Be a man. Trade like a man.... You shouldn't be here. You're not a trader. You can't trade without those."

Donald MacKenzie, An Engine, Not a Camera, loc. 722