yeah, this is a bastard of a phenomenon. BUT THERE"S A GOOD REASON 4 IT!...
in my psych classes at uni we learnt that apparently when you are having the 'good time' on e, and your high as a mutha, apart from your seritonin and dopamine being disallowed to be 're-uptaken' (keeping a nonstop high level of the two substances in the synapse, making u feel like a king), there is this little thing called glutamate which is realeased in ANOTHER part of your brain, which adds to the goodness and allows you to learn that this good feeling is something you might like to do again.
so when you get drunk, and you feel good (all becuz the brain has released a bit o' dopamine), glutamate is also released and it triggers the brain to crave the experience it had while doing drugs.
i find that even sometimes when i just feel really happy or excited when i'm sober, i want to drop an e, but caus i'm not drunk and more strong willed while im sober, its easier to say no. or if i hear a song when i'm sober, that i listened to while rolling, then i want to drop aswell...its all cuz of fucking glutimate
most of my fucking rolls are after a big nite on the piss, when i'm trollied and up for anything and manage to convince some other poor bastrds to drop with me, and its like 5am by the time we dump, so by nine in the morning were all coming down, scattered as a fuck, on top of this is our killer headaches from the booze...and then the self-loathing starts and regret and all that shit...
but it always seems to end up that way for some reason, dont kno how to stop it, i hav little enough self control when im sober let alone drunk...
anyway, thats the quasi scientific reason behind this shit