I have had this discussion with my daughter since she was about 3, that nobody is ever to touch her "pee pee" place unless I am there. I have explained it is special and that it is private just for her. That sometimes babysitters may need to wipe her, that the Dr may need to check her out but that only with mommy's permission is this allowed. You need to acknowledge that really not even teachers of family members are allowed UNLESS they are wiping poopies off of her and never should they touch her pee pee area, I even let my daughter know it is a vagina and all women have them and they are just very special. I went into some detail how we do no show anyone our vagina and it is very private. At her age there is no reason for family members or teachers to be touching her, wiping is one thing but touching is another. With kids this age, you just have to present it in a manner that is very matter of fact, state the facts, call the body parts what they are and explain it is hers and private. There isn't anything scary and only when my daughter hit 6 did she ask me why it was private did I have to get into a little more detail without scaring her, just explaining that it is time she is old enough for privacy, that our bodies are Gods gift to us and we need to treat them as they are special and that there unfortunately are bad people in the world that may try to hurt her. I have told her to never believe someone that tells her not to tell that she should always know that it is my job to protect her and she can always tell me!!!