OK so we have a 6year old kid (plus or minus) who simply imitates what he hears on the radio, in an elevator, or at the dentist office over the musak system, what else should we expect? This kid doesn't have a clue about what sex is much less what harrassment is because he is pre-pubescent and can't even spell harrassment.
To me this is political correctness and overbearing morality taken to absurd extremes. We cannot and should not expect children to have the same judgement and social skills of an adult. Also we have no control over what a child is taught at home and just what kind of environment a child has at home.
These people are supposed to be educators and they, above all others, should recognize that children learn largely from emulation or copying what they see in their surroundings. Punishing this child in this mannor is wrong in my opinion. Instead the teacher should have tried to explain to this youngster about why it is inappropriate behavior and if that fails then punish with isolation to get the point across. Suspension only contributes to the child's ignorance, sends them back into the environment that most likely created this behavior, and does not address the social problem that is before them at the moment. It just hands it off and abdicates the teaching responsibility.
Now I know that teachers are often overloaded now and have their hands full but if we cannot address a problem correctly then we will finally have to admit that there was no problem to begin with and just learn to live with the consequences. All suspension does is make a bad problem worse in today's world because many parents are completely oblivious to their own children and their behavior. Just look around in Wal Mart or at the local super market. :={