If you are over 50, your tee shirt shop is called Target or Big W. Your colour is white or black and your size is immaterial – just get it big. No-one is looking and no-one cares. You can wear the thing inside your flannel shirt in the winter and be comfortable.
If you are younger, your tee shirt is a statement and where you buy it is important. The people who sell it to you want you to be happy – happy to advertise their shop or politics to others and happy to take your $ 50 for it. Go-on – make yourself poor and spread a little happiness.
You’ll find a surprisingly large number of stores willing to enter into this game – they’ll be up, down, and side-market venues and the staff will look happier than you do. No wonder – other people have been in before you and emptied their wallets and purses into the till and the staff know this.
If you wish to reflect on the fact that the only people who used to wear tee shirt were the old bastards up the top of the page…and that the shirt was a form of underwear…you may wonder how it came to be the defining garment of whatever generation you now occupy. This happened because they were originally cheap cotton things and people bought them for a purpose. Then the makers discovered that you could screen print Che Guevara on them and sell them to chardonnay socialists for $ 50. And away it, and you, went. In your case without your $ 50.