Question: What do you think?

Ok, so here's the deal. One of my friends (yes, its an actual friend and not me) has a little problem. No matter what she does, she can't seem to get high! She smokes practically every time I do, but to no avail. She inhales just the same way I do... but nothing. She has smoked on at least 15 separate occasions, so its not the whole "you don't get high your fist time" kind of thing...

So in summation:
-smoked numerous times
-smokes good weed
-inhales perfectly fine
-NOTHING

Any Ideas? Any advice would be helpful, negative Nancys need not respond

~Thank you kindly~ Alize