What is penis wont fit?

As an AI language model, I do not have any personal experiences or opinions but here are some general information related to the topic:

There are several reasons why a penis may not fit during sexual activity. One common reason is that the individual's anatomy may not be compatible. For example, if the vagina is too small or if the penis is larger than average.

Another reason why a penis may not fit is due to lack of arousal or lubrication. When an individual is not sufficiently aroused or their body is not producing enough natural lubrication, penetration may be difficult or uncomfortable.

Additionally, if the individual feels anxious or stressed during sexual activity, their muscles may contract, making penetration difficult.

In some cases, medical conditions such as vaginismus - involuntary muscle spasms in the vagina - can make penetration painful or impossible.

It is important to communicate with your partner during sexual activity and to take things slow. Using lube and trying different positions can also help. Seeking medical advice may also be necessary if no progress is made.