^You're right about that! :D (though I don't know about Heroin.)
By the way, have you ever had the chance to try R-ketamine? It seems nearly impossible to find and I've heard it's more dissociative than S-ketamine (ergo, racemic is more dissociative aswell) but 2-4 times less potent in its psychedelic properties.
I'd really like to try playing around with R-ketamine because full on dissociation doesn't always happen with S-ket, or racemic for that matter. And it's an aspect of ketamine I thoroughly enjoy. Racemic and R-ketamine makes it harder to remember the entire K-hole experience though and is less psychedelic, which I find highly unfortunate..