I highly recommend this webpage - I read most of a pretty good book on brain chemistry including dopamine called The Compass of Pleasure. This webpage induced 60+-10% of reading the book in 2+-1% of the time plus some extras.
Meth and the Brain: The Pleasure/Reward Circuit’s Role in Addiction
(Note: I removed the link because it has been replaced with a forwarding page, but there is lot of good info out there, though I haven't yet seen anything so brief and so full )
Check out the comparison of dopamine levels chart in the webpage between meth vs sex 200 vs 1250, food vs sex 150 vs 1250
By the way, from reading the above book, marijuana and mushrooms do not ramp up dopamine that much. And the book was super negative on smoking because smoking is like taking a dose of nicotine with each puff.