I dont understand these people.........
Edit : I wish i didnt have watched second video.
The problem is they try desomorphine or a morphine based synthetic and they enjoy the feeling so much they do it a couple more times. By this time the chemicals that inhibit the hydroxytryptamine (serotonin) receptors are depleted an need more hydroxytryptamine, but sadly the drug used over produced said hydroxytryptamine, causing the body to feel a physical dependency towards the drug to replace the hydroxytryptamine that can not be regenerated on its own.
Basically it's like emptying your food reserves into a fat mans belly, and then taking the fat man and feeding him to another fat man to keep him full, and it continues until eventually the fat man dies from eating too much fat from the other fat men.