How to ask to shave? For Girls?

I am SOOOOO scared to ask! I really would like to shave (legs, underarms, maybe ''down there'') because I am thirteen and in gymnastics, it is embarrassing! I have such hairy legs and the hair is like, black! Is ther any way I can drop hints about either of them? In the car a few days ago I said, "Hey mom! Look, my mosquito bites are almost gone on my legs (hid legs) ewwww my legs are so nasty," Mom: "Why?" Me: "They are so hairy..." Mom: "Welllllll" and that was that and she went on with a different topic. PLEASE HELP!!!! The only reason I want to shave 'down there' is because when I wear a body suit at gymnastics, hair is 'leaking' out the side of the body suit down in that region so please don't say that is too extreme or I am too young! Thank you for all the help!