When did Hestia, Athena, and Artemis decide to become maiden goddesses?
There is one poem by Callimachus that describes Artemis asking her father to allow her to remain a virgin forever as a child.
Artemis we hymn – no light thing is it for singers to forget her – whose study is the bow and the shooting of hares and the spacious dance and sport upon the mountains; beginning with the time when sitting on her father’s knees – still a little maid – she spake these words to her sire: “Give me to keep my maidenhood, Father, forever: and give me to be of many names, that Phoebus may not vie with me. And give me arrows and a bow – stay, Father, I ask thee not for quiver or for mighty bow: for me the Cyclopes will straightway fashion arrows and fashion for me a well-bent bow. But give me to be Bringer of Light1 and give me to gird me in a tunic2 with embroidered border reaching to the knee, that I may slay wild beasts.