Lyric discussion by Speedway 

Cover art for Perfect Day lyrics by Lou Reed

Like many people have said, I don't believe this song is about heroin. Lou Reed isn't often one to hide significant meanings in songs, however much of a taboo subject they may be - usually he's very explicit about drugs etc. But then again, considering Lou's links to the drug at the time I guess we really can't rule out that it is about heroin either. Maybe he was just trying to take a more subtle approach to writing about the drug, having already written outrightly about it, notably of course in 'Heroin' with the Velvet Underground.

I think we can be more or less sure that this doesn't describe Lou's personal perfect day: as he told Jools Holland "I wouldn't know what my perfect day was if it came up and bit me on the nose". To me, it is more of a mock-romantic setup rather than a real life situation, perhaps meant to be a bit ironic or menacing ("you're going to reap just what you sow...").