 Unintentional reasons involve being highly sensitive, shy, past trauma or events, or having various mental disorders.More than one type of loner exists, and those who meet the criteria for being called loners often actually enjoy social interaction but display a degree of introversion which leads them to seek out time alone.The modern term "loner" can be used with a negative connotation in the belief that human beings are social creatures and that those who do not participate are deviants.