As a healthcare professional, it's important to understand that the ability to retract the foreskin varies among males and can change over time. Here's a detailed answer:

English Answer:

The ability to pull the foreskin back, a process known as foreskin retraction, typically develops during childhood. Most boys can retract their foreskin by the age of 10, but it can happen earlier or later. It's not uncommon for the foreskin to be non-retractable in infants and young children, a condition known as physiological phimosis. This usually resolves on its own as the child grows.

However, if a male is unable to retract his foreskin after puberty, it may be due to pathological phimosis, which can be caused by scarring, infection, or other factors. In such cases, it's important to consult a healthcare provider. Forcing the foreskin to retract can lead to injury and should be avoided.

Translation:

作为医疗保健专业人士，了解男性包皮回缩的能力是不同的，并且随着时间的变化而变化。以下是详细答案：

中文回答：

包皮回缩的能力，即能够将包皮向后拉的过程，通常在儿童时期发展。大多数男孩在10岁之前可以回缩包皮，但也可能更早或更晚。在婴儿和幼儿中，包皮不可回缩是常见的，这种情况被称为生理性包茎。随着孩子的成长，这通常会自行解决。

然而，如果一个男性在青春期之后仍然无法回缩包皮，可能是由于病理性包茎，这可能是由瘢痕、感染或其他因素引起的。在这种情况下，重要的是咨询医疗保健提供者。强行回缩包皮可能导致受伤，应该避免。

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The foreskin can be pulled back when its inside surface separates from the head of the penis, and the foreskin's opening widens. This process happens naturally in childhood or during puberty and has usually happened by the age of 18.read more >>