It is low IQ coupled with poor impulse control both deficiencies being biological in nature.
You reminded me of something. It is too inappropriate to post openly, but you reminded me of it:
Lately, with the death of Trayvon Martin there has been much discussion about gated communities. Some folks are concerned that black people do not have access to gated communities, and that gated communities are de facto white communities designed to exclude people of color.
That is absurd. Gated communities have always welcomed black people. In fact, there are gated communities created SPECIFICALLY for black people.
They’re called prisons.