Suck (Pigface cover) Lyrics

Lyric discussion by Helixi 

Cover art for Suck (Pigface cover) lyrics by Nine Inch Nails

This song is about heroin. runs up my arms 'til i'm on track is a dead giveaway. Trackmarks. itches my skin right off my back is also a giveaway, heroin makes you itch depending what it's cut with. How does it feel? Like jesus christ on ecstasy. But then later, dirty on the inside.