They're trans, and probably don't use things like breast implants or wigs.
Chastity is sought because it allows a sissy to stay horny, giving them the drive to further their sissy desires rather than losing them after orgasm.
Yes, one of the main reason for the world fucking sissies more than woman is that they can not get pregnant and you can do as much sex as you want without worrying about pregnancy tests and kids.
Selfies allowed only in the pinned Saturday selfie thread.
Or… maybe you were just born that way.
A sissy doesnt know that how awesome are they as a creature on the earth.