The first 2 or 3 times I smoked (joints) I didn't get high, I wasn't even sure what "high" was.
It took until I hit a bong (on my 3rd or 4th time, something like that) until I certainly knew what "high" is.
I don't know if this is because I wasn't inhaling properly, or because I just didn't get high due to some weird and wonderful explanation to do with the way our bodies work.
A few more times and he should be sweet.