And told me that my tape taught 'em to swear

from Eminem – Who Knew Lyrics on Rap Genius

Meaning

A reference to the parental belief that music and media are direct influences on a child’s behaviour and life, and once a child sees something in the media or popular culture, they are more likely to do this.
Eminem doesn’t believe this is necessarily incorrect, but he does believe that the influence is largely exaggerated and disproportionate.

To help improve the meaning of these lyrics, visit “Who Knew” by Eminem Lyrics and leave a comment on the lyrics box