Roz 30
Would be of more use to you if you posed the question of how many on this site and/or friends/relatives of same, read the so called 'Agony Aunt Pages'
As a sure non reader I could not possibly suggest the mental reasons why people do so.
I would like to hear the result of your research, if you have time to return and post same.
Not telling you to suck eggs but age, sex, status etc etc. would be needed for you to come to any conclusions for your studies.