A guy with one testicle will have the same change in his voice that he would have if he had two.
A 30 year old will have no problem having children if he has only one testicle, as long as that single testicle is in good health.
Having one testicle is not going to have any affect on your ability to play football.
NO! :) Try a testosterone booster from GNC, or an over the counter pre-sex pill; like "rock-hard" or "black ant"
It should not affect performance however may effect sperm count and reproductive capability.
Is having just one testicle normal, no. Normal is men have two testicles, but it does happen. Sometimes due to an accident or illness, sometimes a boy is born with only one developed testicle and as long as it is healthy, your sex life and fertility will not be effected. Make sure you see a doctor to ensure you don't have an undescended testicle or a hernia. If the second testicle is trapped in your abdomen, it can be strangled and the one testicle you can see could end up slipping through the hernia too.
increase stamina
Well if those are the only ones you have you will not be able to have kids.
The social drawback of possessing only one testicle will more than likely make one very upset. The chemical inbalence that is experienced may also effect the patients breasts and acne.
Yes, as long as the testicle is functioning properly then you can reproduce with one testicle.
Yes, he has only one testicle.
Not if only one testicle is removed. You can produce sperm just fine with only one testicle