Keep It Up! (KIU!) is a project that seeks to test the efficacy of an internet-based prevention intervention that was developed by Dr. Brian Mustanski and the Impact Program at Northwestern University. KIU! is a multi-media online HIV prevention program developed for young (18-24 years old) men who have sex with men (MSM). The intervention includes discussions of community involvement, scenarios on hooking-up online, communication skills in relationships (including negotiating safer sex), condom use, HIV knowledge, and HIV/STI risks. Men were recruited from various community-based organizations in each of the following three US cities: Atlanta, New York, and Chicago.