i think strong muscle control has alot to do with it. I can also do it when im very excited. I do alot of muscle exercise ya know squeeze hold release while i drive. Congratuations
I would just like to add that alot of women strive and work towards that. It is normal and I actually know plenty of women who squirt including myself. There is nothing wrong with it and it is very much possible.
Some women can, but it's a small minority I believe.