Gender sensitivity is not a big problem till the boys and girls reach the age of 11. But after that it depends upon the atmosphere from which they come to school or which is produced in the class. This is natural that from the age of 12-14 children start to have a keen understand of differences between male and female. At this label if they are not guided well they become a problem for society in respect of health, power and morality. So teachers should be much careful and open minded about it. In India people often hide the sexual facts from the children. They don't try to understand there problems so children too don't talk anything to them. Then they rely for there knowledge upon their friends who also unaware of the reality as they. So the sex education should not be seen with suspect.