:The "teeth in mouth" example: Many if not most adults need to have their wisdom teeth removed. The balding example: Baldness is not necessarily undesirable. Some women--like my wife, find it attractive. Moreover, it often manifests long after a man has reproduced, passed on the trait, and is out of the mating pool. The schizophrenia example: Schizophrenics can reproduce before they demonstrate any symptoms and become undesirable mates, thus allowing the condition to perpetuate even if it is undesirable. [[User:BrentH|BrentH]] 23:42, 28 September 2011 (EDT) | :The "teeth in mouth" example: Many if not most adults need to have their wisdom teeth removed. The balding example: Baldness is not necessarily undesirable. Some women--like my wife, find it attractive. Moreover, it often manifests long after a man has reproduced, passed on the trait, and is out of the mating pool. The schizophrenia example: Schizophrenics can reproduce before they demonstrate any symptoms and become undesirable mates, thus allowing the condition to perpetuate even if it is undesirable. [[User:BrentH|BrentH]] 23:42, 28 September 2011 (EDT) |