How can I improve endurance in bed?

Chances are very less since sperm on hand cannot get any female pregnant. 

It's good news that all your HIV tests came back negative after the risky encounter. However, you should be aware of the fact that sometimes it takes time for HIV to develop and to get detected by tests, so it is advisable to get retested after three months just to be sure. Always use a condom to lower the risk of infection both for yourself and your partner.

Don’t worry too much about it though because many people do masturbate; however, if one does so excessively this could be the cause behind what you’re going through. You might start feeling weaker than usual or notice some changes like less energy in general - all signs pointing towards too much self-pleasure being unhealthy behavior. So, try mending your ways by eating proper meals and working out often since these two acts will help accelerate recovery from this condition should they have already set in.

Having sexual intercourse with an HIV-infected partner without condoms is risky and may result in HIV infection. If you have had sexual intercourse with a sex worker and the condom has torn, you should test for HIV as well as other STIs as soon as possible. 

It could be a result of mental health troubles, stress, angst, or exhaustion. Also, at times, health issues like high blood pressure or diabetes can be a factor as well. Bring the topic up with your wife trusting her and trying not to be defensive. For serious alleviation of the problem, you can communicate with a sex doctor and discuss further treatments if needed. 

It's typical for male growth to range in size. Factors like genes, hormones, and wellness can influence the length. Alternatively, if someone is feeling stressed or sad, they should talk with a friend about it.