At Ruth Institute's "It Takes a Family" summer student conference, Dr. Robert Gagnon (of Pittsburgh Theological Seminary) delivers his second talk--this one on the nature of homosexual unions and Paul's teachings on homosexuality.  He begins by discussing the nature of homosexual relationships, their stability, and the challenges they face (including his rebuttal of the "all-their-problems-are-the-result-of-homophobia" argument); then he discusses Pauline teaching and contemporary views on sexual sin in general and homosexuality in particular.
Dr. Gagnon's first talk, "Jesus & Sex," is available here.