Rammstein "Du Bist Was Du Isst"

T-Shirt is the cover from the Mein Teil single off Reise Reise.

From Wikipedia:
"Mein Teil" is the first single by the German Industrial metal band Rammstein from their fourth album Reise, Reise. The Title means "My Part", but can also be interpreted as "my penis". The song is inspired by the infamous case of Armin Meiwes and Bernd Jürgen Armando Brandes. In March 2001, in Rotenburg, Germany, the two men, both in their 40's, met each other, cut off and cooked Brandes' penis and consumed it together. Afterwards, Meiwes killed Brandes—with Brandes' consent—and ate his remains. As a result, Meiwes was originally sentenced to eight-and-a-half years in jail for manslaughter, but was later charged with murder and sentenced to life imprisonment. A prominent phrase in the song is "Denn du bist was du isst und ihr wißt was es ist" ("Because you are what you eat and you (plural) know what it is").

..so there!