it's actually quite ironic. the more pot you smoke when you begin toking, the higher you get, but as you gradually become accquainted with mary jane, it takes less weed and the high is actually better than before. try mixing up your marijuana, our bodies quickly build up an immunity to certain cannabinoids, even a "weaker" strain of marijuana could do you just as well, if you've been smoking bubblegum for a couple of weeks straight, opposed to buying a more expensive weed. all in all, mix your strains - you'll notice the difference.