intercourse.

The specific approach is:

Have the woman lie on her back on the bed.

Curl your legs and feet up.

The man. Kneeling on the bed between the thighs of the woman with his right knee.

Raise your left knee. Spread your feet out.

Hold the woman's waist with both hands.

Then do the mating exercise.

(A 3D stereoscopic holographic image is presented above the lecture table: Yuanyanghe)

The tenth method is called mandarin duck combination.

Just like the mandarin ducks in the wild, they copulate at will.

The specific approach is:

Have the woman lie on her side on the bed.

Curl both feet forward.

Put it on the man's lap.

The man rides from the woman's back on the woman's lower foot

Put one knee up on the woman's upper thigh.