There's nothing wrong with it and it most certainly is better than learning about sex from watching internet porn. The sixteen-year old of the family who live in the flat above me (I think he's that old, he's one year in high school, he was at the same school as my step-daughter before that) has recently got himself a girl-friend who I presume would be the same sort of age; from the sounds of it she has watched entirely too much internet porn.
German school children as young as five were given a sex-education book giving graphic advice on how to put on a condom and how to achieve orgasms.
Outraged parents complained when youngsters at a school in Berlin were given the book, called 'Where Do You Come From?', which features explicit cartoon depictions of sex.
The book, which shows a couple called Lisa and Lars engaging in various of stages of intercourse, shows Lisa putting a condom on Lars and another image of the pair having sex.
You not planning to ever tell us about the "cozy corner" and teaching four-year old to masturbate each other?