 The reasons given by some smokers for this activity have been categorized as "addictive smoking", "pleasure from smoking", "tension reduction/relaxation", "social smoking", "stimulation", "habit/automatism", and "handling".There are gender differences in how much each of these reasons contribute, with females more likely than males to cite "tension reduction/relaxation", "stimulation" and "social smoking".Some smokers argue that the depressant effect of smoking allows them to calm their nerves, often allowing for increased concentration.