Lumbar disc herniation, lumbar strain, scoliosis …… Can we still have sex happily? Of course we can! How can we give up the basic duties of human flourishing? Nowadays, the second child policy has rekindled the snapping orgasm for people with back problems! Of course, I’m talking about adults, so please don’t worry about children with the disease! Some studies have shown that over 60% of people with back problems have increased back pain when snapping and have to reduce the frequency of sex. The study shows that more than 60% of people with back pain have to reduce the frequency of sex, considering that there are many people with back pain. There have been many recommendations for positions to relieve back pain during intercourse, but none of them are supported by scientific test data. The professors used an electromagnetic motion capture system to analyze spinal motion parameters from a biomechanical perspective in different positions, and then recommended appropriate positions for intercourse based on low back pain. They invited 10 healthy adult couples and randomly arranged to have sex in the following positions: 1 rear-entry: female elbow support 2 rear-entry: female hand support Type 1 missionary: male hand support, female hip and knee extension Type 2 missionary: male elbow support, female hip and knee flexion Side lying position; the results of the study showed that compared to the missionary position, rear-entry and side lying positions had faster speed of movement. Although the range of motion of the male spine varied according to the intercourse position, the spine was mostly in the flexed position and displaced mainly in the sagittal plane. Analysis of the amplitude probability distribution function revealed that type 1 missionary and type 2 posterior entry positions had the least dorsal flexion displacement, while the lateral recumbent position had the greatest flexion displacement. Based on the above findings, the authors concluded that patients should adopt appropriate positions according to pain triggers: 1. For male patients with lower back pain who are intolerant to back flexion, the authors recommended type 1 posterior entry and type 1 missionary positions for intercourse, and avoided lateral recumbent and type 2 missionary positions for intercourse because the latter two positions had the greatest anterior spinal flexion displacement. 2. While for patients with back extension intolerance, lateral recumbent and type 2 missionary positions can be adopted. The authors also point out that patients with motor-intolerance (motion-intolerant) should preferably not take these positions. 4. Patients with low back pain can also try reciprocal training of the hip joint at the time of hinge, using more hip movements during intercourse rather than whole spine movements.