How to convince my mom to get a snake

[Diveks]

Hello i just want to ask how to convince my mom to get me a snake (ball python) i wanted a corn snake but my mom dont like anything too fast moving, i have researched for about a year on ball pythons. I have asked twice and she said no i asked why? First time she had no reason and the second time she said her mom said i cant have a snake. I have told her they are not dangerous she said she know, but she still said no. I already have pets and she know i am taking Good care of them. I have chickens, a bearded dragon, a large aquarium and an avairy. how do i convince her? And its not about having too much pets.