Because an airbag jacket is personal protection equipment, one jacket does not preclude you from equipping several motorcycles with an activation cord. That way you can jump from one bike to another, without much fuss.
Another important thing to know is that an airbag jacket is reusable. Although - even when you forget you're wearing it - the airbag doesn't inflate on its own, you can absolutely demonstrate to friends or family how it works. Please order a new CO₂ cartridge beforehand so that you can get back on the road safely.