The gun's instructions are simple, you don't need to charge it, point it towards something, the gun will sense your intent and will auto-lock onto whatever your thinking of, a laser beam will shoot out and hit the thing your thinking of, and that thing will turn into a breast with a proportional size.
The actual steps were
1. pick your target
2. shoot
3. target is hit
4. target starts turning into a breast
5. target is a breast
6. ???
7. enjoyment
As a test shot you go to your desk drawer and fish out something small in the back of it you didn't really care about... some dried out novelty pen you got... somewhere... So you've picked the target... and to test the homing capabilities you took out of your desk a random penny and aimed the gun at the penny. You pulled the trigger and a little beam of light shot out of the gun, and then veered to the pen which then morphed spherical with a little nub on top creating a small little boob. You squeezed it enjoying the feel and warmth of the little boob. Then you put the boob in your desk again and thought about what else to turn into a boob.