I’ve carried a pocket knife all my life but never thought of carrying a shirt pocket knife. In the first picture of this thread is the little breastpocket Boker in S35VN that I received this Christmas. After a couple of weeks of use I’m smitten. It won’t replace the stout little frame lock flipper in D2 that is my EDC but it is perfect for a “going out” knife and would have been an easy choice back when I was working full time.
(Plus, since they’re referred to as a “gentleman’s knife” who am I to argue the inference? 😉)