What is your smoking method? glass, vape, paper? But yeah hes right it takes like 4 days of straight use i feel lie to get accustomed to being high, like no paranoia and stuff. But also, there are different kinds of MJ, Indicas Sativas and Hybrids, to be short and to the point,

INDICA- Couch Lock, Body High, sometimes sleepiness

SATIVA- more of a "head" or mental high, dosnt keep you awake neccesarily but doesnt mae you tired

HYBRID - take the best of both, good mental high with tiredness for some, good body high and no tiredness with others

Use google, type in the strain names and a brief description of the high will show up most of the time. and next time you go back to the shop tell him you want a sativa cause the bubba kush made you tired. the more you smoke, the less effect it will have on you, but i mean after years and such