no this is not common you need to go to a clinic straight away pigeons fly upside down and when they land, they go to sleep and mice like to walk on 2 feet while handstanding
Many males have a testicle , which is larger then the other one.
Any testicle problems should be taken to a doctor. There are many reasons for differences. See the link below.
Where can you sell a testicle in Kansas
If it's a firm lump behind your left testicle, it's cancer. If it's not, it's nothing. Your testes should be relatively firm with some give. Each testicle will be a slightly different shape or size and this applies to firmness too. However, if you still have any concerns, see a doctor.
As long as blood is pumping through the testicle then it should have a pulse, the left testicle should have a pulse too.
maybe it could be that his testicle has been hit which is affecting his back or vice versa. Just a thought. 2nd Answer: Pain in those areas is common to a kidney stone "attack". It is also common to some very bad conditions which, if they persist for more than a day or two, should be looked at by a doctor.
Nowhere, there is no market for testicles.
They don't. There is no market.
you might need to go tell the doctor that when you put your finger up your bum and it bleeds that's when your ball tingling.
same as the left, making sperm and semen
A boy with an undescended testicle should be taken to a doctor as early as possible. See the link below.
The left testicle does the same as the right testicle, which is to produce sperm cells. Combined both testicles actually make 1,000 sperm cells a second. Although, you must take into account a large number of those cells will be deformed / unusable. (About half)