I must admit that I sometimes sorely miss the bygone age of penny farthings, sleeve garters, and neckties that just hung there making you look professional instead of linking to your OKCupid profile.
Those were good times. Then again, times change, so it shouldn't be a surprise that you can now get your own QR code subtly printed on your necktie (QR codes have been printed on ties before, but usually on the front where they're painful to see).