Two videos that train barbers to perform a shave with a straight razor, by different teachers, demonstrate a "pinch" technique:
Question: During your own shave with a straight razor, do you use the pinch technique, and if so, in which places and how exactly do you pinch yourself while controlling the straight with the other hand?
At 9:35 in watch?v=tinqoTbMvOc&t=575 -- pinch is of facial skin, away from and on either side of the tips of the lips
At 11:25 in watch?v=2W_IqXc9ni0&t=685 -- note that the pinch is (not the closing of the nostrils by pinching the walls of the nose but) of the facial skin on either side of the nose
Question: During your own shave with a straight razor, do you use the pinch technique, and if so, in which places and how exactly do you pinch yourself while controlling the straight with the other hand?