Not every trait that exists has to be selected for. It just has to not be selected against enough for it to be completely wiped out. Some people procreate befor

Not every trait that exists has to be selected for. It just has to not be selected against enough for it to be completely wiped out. Some people procreate before they commit suicide, even those that don't would have relatives who might have been spared by different circumstances, or a slightly different mix of genes.