One of my few t-shirts that isn’t faded to grey and several years old. The title is from a lyric by the Voluntary Butler Scheme, which goes:
“(And if you ever start to feel square)
Wear a Denison T-shirt every once in a while to make you feel more hipper than you are”

I don’t know what a Denison t-shirt is, and I don’t think Paul Smith counts as hip, but there you go.