Penthouse Forum

Penthouse Forum, sometimes simply Forum, is a magazine owned by FriendFinder Networks, the publishers of "Penthouse" magazine. 
History and profile.
"Penthouse Forum" was started in March 1968 and featured letters, articles on health, medicine psychology and social relationships. Its subtitle was "International Journal of Human Relations". An American edition was published from 1971 and was the fastest-growing national magazine by 1978. In the 1970s, "Forum" was one of the most-sold magazines in America. In 1996, "Forum" had 400,000 subscribers.
The letters section of the magazine became popular so another publication, "Penthouse Letters", was created to feature these.
Notable contributors.
Many of the editorial staff and half of the letterwriters whose contributions were published were women.
Alastair Campbell, a journalist and Tony Blair's former Director of Communications, was a contributor to the magazine, as was Chad Varah, the founder of The Samaritans charity and an Anglican priest, who was a consultant on sex education for the magazine.
In July 2006 the rights to the UK edition were licensed to Trojan Publishing.