Not that I would know....
But it is true that the first time takes far more than it does to get subsequent highs- sort of an inverse tolerance effect.
Brownies are a very tricky way to ingest the stuff... you have one brownie, no effect, so you have a couple more- still nothing, you begin thinking that this is an amazing waste of marijuana- then you stand up and soar through the ceiling... (or at least thats what I have been told ;)
Anyone hoping to blackmail me because of what I post here, dont bother- I have had to fill out an application for security clearance and you DONT lie on those, you can be sure the government knows more of my dirty little secrets than anyone here. (Davin excepted)