The Puerto Rican population is 95% Catholic. The Church is strong with a fundamental Christian base to the morals of the culture. In 1964, the Catholic Bishops formed a political party and threatened excommunication for anyone who didn't join their party. Abortion was illegal (until Roe v. Wade) and homosexuality was illegal until the Supreme Court Lawrence decision. Homosexuality is, to quote my mother, "an abomination".
Another problem is that you are not supposed to leave your parent's home until you are married, or go to University (unless it is physically possible to commute). So most people live at home and never have a place to make out (this holds for both homosexual and heterosexual couples). That is why cars and public spaces in Latin cultures are so busy.
AIDS/HIV is a unique feature of the Puerto Rican GLBT story. Since more than half of the HIV/AIDS population in the island is resultant from IV drug use, a very different dynamic is at play. Either way, HIV positive individuals are at the very bottom of the GLBT hierarchy and are discriminated against by the rest of the GLBT community just as much as the general population.
To speak of a solution to the HIV/AIDS crisis in Puerto Rico, you will need to address two completely different issues, both with distinct stigma: homosexuality and drug addiction.
Drug addicts are a completely different story. Trying to support their addiction they are more often than not forced to have unprotected sex to maintain their habit. With lack of housing and just worried as to where their next meal will come from, HIV therapy is the last thing on their minds. Thus, they are very unreliable about taking their life saving “cocktails.”
I fear the only solution to the uniqueness of the Puerto Rican HIV problem will not be undertaken. I hope it will not take a scenario like South Africa where the government waited until one third of the population was HIV positive to finally intervene. The only solution I can see is for us to unite as a country and demand from both the Catholic Church and our dutifully elected officials to implement a campaign to promote prophylactic measures other than abstinence. Otherwise, Puerto Rico will be headed for an HIV disaster.