my mom has a little sister in big bros/big sis program. she was in 3rd grade when this happened. she came over to our house, i was a senior in high school at this time. she was telling my mom about what happened in recess. she said "this boy named jeremy, i think he likes me" and my mom asked her why, and she said "because he did the h-word to me at lunch today on the playground" and my mom then said "oh he hugged you?" and she said "no, he got on top of me and humped me".
my neice is 6 right now. when she was in kindergarten, we took her out on the lake on my jetskis. she had to pee. my mom told her to go in the lake. she said, and i quote, "my cooch isnt long enough to do that grandma" and she had heard it at school and ever since has refered to a penis and a vagina as a "cooch" and knows what they are. my sister and her husband are probably two of the most protective, responsible parents around, and they were amazed that she had heard that at school.
just because your kids don't know what it is doesn't mean it's not true that kids that age know about sexual things. personally, i find it absolutely disgusting. i couldn't believe that a 3rd grader actually knew what "humping" was. but it's real, and it happens. feel lucky that your kids are hopefully not around other kids that know about these things. and like i said, for a school to be giving those surveys is pretty ridiculous at that age. however, you did say that you tell your kids that people aren't supposed to touch their private parts. therefore, what is the problem with asking them if it has happened?
i'm not trying to justify the school's actions or the survey, or even the court's actions because i have had other experiences with this court's rulings in my government classes. even though it seems ridiculous, there is no law stating that it is illegal, therefore it is legal and it can happen. it's sad but true. the good ole land of the free...