DO NOT SUCK YOUR OWN COCK. IT HAS DANGERS.

1. The rib cage can be strained by doing it, with the bones being pulled and tensioned, this causes the bone marrow to be extremely malleable, with weak bone marrow causing a deficit in healthy red blood cells leading to anemia leading to death

2. The throat is narrow, with it even being more narrowed due to muscle straining being slouched over sucking your penis, i calculated and it has a high chance of getting lodged in the oropharynx and it might cause damage to the epiglottis. You have a high chance of choking on it and dying

3. Doing it commonly can cause back pain, as it is a very unnatural position and may cause injury, leading to arthritis later in life

4. It wont even work, because the pain will outweigh the feeling.

5. It also has effect on other muscles, with it straining the neck. Doing this commonly may rupture nerves and in rare circumstances may lead to death