Puberty. 12, or 13 probably.
Yes it has came out of me before at 9 years old
It's called 'semen' (see-men) and it has sperm in it. The semen can be made to come out forcefully during an ejaculation, part of the sex act. If you can not ejaculate yet it is probably because you are not old enough and haven't got that far in your development yet. it usually starts around pre-puberty from the age of 10 and around. That is when semen can come out but semen does not contain sperms until you have reached puberty.
The same as anything else you digest
If your semen smells nice, your sick. Semen smells like a sort of bleach.
You have to hit puberty before your body can produce semen (cum).
That is certainly a young age for producing semen.
I don't think you came.
No. When you swallow the semen, it goes to stomach and digested. Sputum comes from your lungs.
no
No, they don't.
No
The urethra is responsible for ejaculating sperm and expelling urine in men.