Final answer:
A sexual dysfunction in which a man reaches orgasm well before he wishes to, perhaps even prior to penetration, is called premature ejaculation.
Step-by-step explanation:
The sexual dysfunction described in the question is known as premature ejaculation. It is a condition in which a man reaches orgasm earlier than desired, often before or shortly after penetration. This can lead to dissatisfaction and frustration for both partners.
Premature ejaculation can have various causes, including psychological factors such as stress, anxiety, or relationship issues, as well as biological factors such as hormonal imbalances or an oversensitivity of the pen/is. Treatment options for premature ejaculation may involve behavioral techniques, counseling, medications, or a combination of approaches.
It is important for individuals experiencing premature ejaculation to consult with a healthcare professional or a specialist in sexual health to receive an accurate diagnosis and appropriate treatment.