Clutch vents differently…

Evening, today at work, the subject of clutch ventilation came up….had told me that I had to pump well with me….thinks a colleague, he would always make this quite easy: he supposedly goes to the front of a caliper, put there on the ventilation nipple a hose, the other end on the clutch nipple and then presses the brake fluid from the brake caliper (nipple open of course) into the system of the clutch until above no air comes out. Done. Constant control and refilling of the brake fluid provided. From the principle to the point of view, has any of you tried this before?