You will be delighted to learn that in 1782, Mozart wrote a piece of music titled "Leck Mich Im Arsch". Yes, that's "Lick me in the ass". Pure genius. You can hear it on YT.
But this will probably delight you even more: Mozart composed another piece called "Leck mir den Arsch fein recht schön sauber", which translates, according to Wikipedia, as "Lick me in the ass fine well and clean". The lyrics to that canon, which may or may not have been written by Mozart, are easily filthier than any hip-hop song.
Now I must scour the web for Beethoven's sex-tapes. And you're welcome.