A court in the US heard that former New York police officer Gilberto Valle had discussed cannibalism with a British man on an obscene fetish website.
British nurse Dale Bolinger said after he was arrested that he had written "stupid things" online because it was "funny" and his involvement was "fantasy".
Kent police said the sex offence charges against Bolinger came after a joint investigation between UK and US officers.
The charges follow an extensive Kent Police investigation into alleged conspiracy offences in both the UK and the USA.
More top news
A slice of the Queen and Prince Philip's wedding cake has sold for £500 at auction, 68 years after the couple got married.
A man has 'potentially life-changing injuries' after acid was thrown over him after a screening of the movie Straight Outta Compton.
A leading sexual health clinic has apologised after mistakenly sharing the HIV positive status of hundreds of patients in an email.