Similar to the straight pen swing, the man’s feet are stretched and clamped, lying on the bed; the woman puts pressure on them, and his feet are open to the man’s feet, moving forward and backward.
Advantages of this method: both men and women have a strong sense of skin tightness. The man can touch the woman’s breast, more than the woman’s multiple stimulation.
Disadvantages of this method: the female side consumes a lot of physical energy. For obese people, this approach is more difficult.