I assume the question is posed by Tariq Nasheed.
Honest answer:
When a smooth knife is withdrawn quickly, without twisting or wiggling, the flesh closes back together but does not seal.
It takes a short while for the blood pressure and increasing heart rate to force the blood to the surface and open the wound.
Honest answer:
Why don’t we do to the violent urban youths (and cartel members) what was done in El Salvador?