Material and Method: A cross-sectional study was conducted on third year male university students between June 2008 and February 2009 using anonymous self-administered questionnaires.

Results: Among 1,101 eligible students, 1,013 (92%) responded. The prevalence of heterosexuality, homosexuality, and bisexuality among respondents were 90.2%, 6.7%, and 3.1%, respectively giving a prevalence of HB of 9.8%. Significant factors predicting HB included having separated parents. Overall lifetime prevalence of men having sex with men (MSM) was 6.3% (2% in heterosexual males and 46.5% among HB males). HB males were more likely to have multiple sex partners and engage in group sex, and less likely to use condoms than were heterosexual males.

Conclusion: The prevalence of sexual risk behaviors among these male students, especially HB, was high.

Keywords: Sexual orientation, Sexual risk behaviors, Men who have sex with men, University student