Why is my sexual stamina low?

Realize that being sexually aroused is natural, however, overdoing may deplete your strength and hinder you from gaining muscle. Get a new hobby that will keep your mind off this practice. You can also try exercising to help develop your body and eat foods that will boost your energy. In case this becomes difficult for you, talk to an older person that you trust or a counselor who can support and guide you through it. 

This issue is severe because it can lead to complications in the body through the semen being absorbed. It can be a symptom of a condition called semen retention, which may be experienced as weakness, fatigue, and sexual disorders. The treatment for this condition is proper exercise, a balanced diet, and sleep well.

This can happen because of the sudden increase in blood pressure, muscle tension, or changes in hormones during the activity. To help lessen these headaches, you might try taking it slower, using techniques to relax, or turning your body to a different position. If the headaches still annoy you, it's a good idea to talk about this with a doctor.

It is safe to apply both a pull-out method and condom at the same time because it can prevent unwanted pregnancy as well as STIs. 

It seems that you had what's known as “pre-ejaculate” after your shower. This is a natural fluid that can be released before or after sperm. It usually occurs as a result of being turned on and doesn’t indicate any problems with health. 

Masturbation is a natural phenomenon, but overdoing it can become a problem. If you start feeling guilty or ignore other activities, it is an indication that you are masturbating over the top. Stress and boredom are very common factors that make people do it more often. Avoid motivation like being alone or consuming adult films. Stay occupied with hobbies, exercises, or spending time with friends to help lessen the temptation.