Which child would react most negatively if a mother tried to discuss puberty?

When girls reach ages 10 and boys ages 12, they develop physical changes which affect them differently. In girls, the first sign of puberty is breast development. During puberty, a child's body matures into an adult body capable of sexual reproduction. There are 3 changing phases:

1. Puberty Phase 1 - 10-12 years

2. Puberty Phase 2 - 13-15 years

3. Puberty Phase 3 - 16-18 years

The child between these ages would react most negatively if a mother tried to discuss puberty. He is so young to go thru the physical, psychological and social changes that he needs to be understood.