Why are all AIDS awareness ads on Michigan radio stations set to rap music?

Every time I hear an AIDS awareness commercial, like the "greater
than" ads, it's always set to rap music, with obviously black people
talking in the ad. Why aren't there any ads set to country music or
rock music, or punk, etc etc? Young people need to be educated about
AIDS, and kids listen to ALL kinds of music. It seems racist to target
blacks with an ad like that. Do only black people get AIDS? Also, most
kids in my school listen to country, rock, and punk/alternative music.