With a young boy at 20s, which sex knowledge should he know?

 Partner is must

Agreeing is must

Mutual understanding is must

Kissing is must

Licking is must

Munching is must

Eating is must

Moaning is must

Screaming is must

Experience is must

Riding is must

Cuddle is must

69 is must

Adore is must

Love is must

Care is is must

Position change is must

Nibbling is must

Milk is must

Condom, candle, candy, coffee, cake, cream are optional..