A Small Rant About the Music Industry

So for the last few days, the top downloaded song on iTunes has been "Promiscuous" by Nelly Furtado and some guy called Timbaland. First of all, does anybody know what promiscuous means? (Hint: not a good thing.) Second of all, does it seem at all likely that the birth-control industry and the music industry have a synergistic relationship? Third of all, why are people buying songs they can hear on the radio every 45 minutes? Finally, am I the only one in the world who knows that Top 40 stations exist for the sole purpose of killing popular music by overplaying it so that new music can enter circulation?