lol she was probably saying that so she could get the first toke. Of course the first toke from a newly packed bowl is going to be the best, Not just the best for getting you high, but the first toke is always the smoothest. Its the THC that is getting you high, once you ignite and inhale it, its gone, the last toke on a bowl is the worst, and probably has next to no high properties left and simply all ash.
Smoke the green man, last hits are crap.