At a time when federal law permitted such conduct, petitioner Jacobson ordered and received from a bookstore two Bare Boys magazines containing photographs of nude preteen and teenage boys. Subsequently, the Child Protection Act of 1984 made illegal the receipt through the mails of sexually explicit depictions of children. After finding Jacobsons name on the bookstore mailing list, two Government agencies sent mail to him through five fictitious organizations and a bogus pen pal, to explore his willingness to break the law. Many of those organizations represented that they were founded to protect and promote sexual freedom and freedom of choice, and that they promoted lobbying efforts through catalog sales. Some mailings raised the spectre of censorship. Jacobson responded to some of the correspondence. After 2 1/2 years on the Government mailing list, Jacobson was solicited to order child pornography. He answered a letter that described concern about child pornography as hysterical nonsense and decried international censorship, and then receiv