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.
It should not affect performance however may effect sperm count and reproductive capability.
increase stamina
Almost all men have testicles of different sizes; this is completely normal. However, if one testicle is strikingly larger than the other, or if you notice any kind of change in size in either testicle, see a doctor ASAP.
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.
Yes, as long as the testicle is functioning properly then you can reproduce with one testicle.
Yes, he has only one testicle.
yes you can (I did)
Can a man with one testicle breed? The answer is YES
change in voice
Many males have a testicle , which is larger then the other one.