Idk how i feel about it....yes the sooner the better but 5yrs old?? thats still a baby. and furthermore parents should teach their children this info when they are ready to. A 5 yr olds mind is on all diff. levels. therefore i dont think they should teach them those kind of things so early in school. PLUS if u teach them about it, they are going to want to try it bc they are going to think they ''KNOW IT ALL''