Wise words Shambles. I think its because its great for the first few times, then after that its just bad side effects and little of the original loved up feeling.. And the side effects are defo fact, plenty of people on heres exericances back it up.
...but conversely, plenty of peoples' experience contradict those 'facts'.
I'm not trying to deny or undermine the warnings signs of meph (ab)use - just trying to look at it from both sides of the fence.
