Basically dressing in t shirts is one of the trends which is fast catching up in both the young and the old whole over the world. The kind of t shirts which people are wearing does not really matter at this level, this is because people have different tastes and due to this we should not expect any uniformity.
However what we probably need to look at are the reasons which have been contributing to the growth of the love for t shirts. Could it be that t shirts have taken over the fashion industry or could it be that t shirts are relatively cheaper compared to other kinds of clothes?
The jury on this matter is out there, we probably need someone to conduct a research on this. The research should be done in a professional manner and all findings should be backed by empirical data or information from the field.