A user on the Washington, D.C. page of the USASexGuide’s massage parlor online discussion forum was kind enough to link to a post of ours earlier this week, at which point we were alerted to the web site’s existence. And boy oh boy, does it contain mounds of helpful/hilarious information about which Asian massage parlors in the District offer the best “full service” technicians. In other words, this is a chat room for men to…