no they shouldn't but if flicked or anything else with a stronger blow it will. Sources:Pornstar
If your testicles ache for no reason (i.e. you have not been over-masturbating), it is best to consult your doctor.
Sandbags
Testicles 'drop', at the latest, a few weeks after being born. If you cannot feel testicles in your scrotum, you should consult your doctor immediately.
Empty testicles.
It's normal, just as when your testicles haven't drop yet.
There will be a kind of aching pressure in the testicles. Just ejaculate and they should feel fine afterwards.
All pain or change in testicles should be taken to a doctor. There could be many reasons, like a simple infection. See the link below.
No, both testicles should normally feel comfortable. Any pain or discomfort in testicles should be taken to a doctor. Testicles can get infections and swellings like any other organ. See the link below.
You cannot "grow" testicles. But if you are male you should have testicles and they will develop as you grow.
Because the testicles (balls) are very sensitive and react to slight touch. Its like rubbing your back when you want to get rid of pain. It feels good.
You actually feel them in your Scrotum.
Testicles are supposed to feel colder than the rest of the body. That's why they sit outside in their own sacs.
Normally, the testicles drop by age 1. If you cannot feel any testicles, please see a doctor, soon. There can be serious complications if you wait.
There are replacement testicles available. There will be a slight difference in their feel but would appear normal.