Woman beater, Chris Brown, who was caught using the f-word slur against a gay man several days ago, is a known homophobe. Brown and Rihanna have been through fights because she is bisexual and tried to turn him the same way. Trying to turn a homophobe gay can get ugly, especially one with a bad temper, who is prone to outburst.
Rihanna thought it would further ingratiate her to Hollywood and the bisexual set she is involved with in Kabbalah, if she was able to make Brown more susceptible to the gay lifestyle. She has tried to change him in a number of ways he does not approve of and it has been a point of contention between the two.