Men who have sex with men
University of Washington 
Their description: Researchers at the University of Washington are conducting research to learn more about the impact of online media on the sexual behavior of men who have sex with men (MSM). Participants will have the chance to win a $50 Amazon.com gift certificate! This study is an anonymous online questionnaire that will take approximately 20-30 minutes to complete. We will be asking you questions about sexual activities, pornography, and your life.
