I can't tell you how I feel. I have spent years squeezing the bags and holding the tap down. I never thought of cutting the end and getting it out that way. I always though I was really clever.
Are there special scissors for this or will any do?
For you I think a pair of box fresh,titanium-tipped,forged from a re-cycled Rolls-Royce once owned by Joël Robuchon scissors would be the minimum requirement.