When they go through puberty, which is different for everyone. For some it can be around 11 or 12, but for others it is not until around 16
No guys who shed their sperm everyday are healthier as they have fresh sperm in them.
Sperm generally starts being produced at around the age of 13 to 15. Remember this can vary depending on how fast the individual is developing.
GUYS
They fap
Ejaculation.
balls
What the actual f**k
The majority of guys do not like other guys semen. (sperm is what swims in your semen) Some guys who are not bisexual or gay might like semen in general. Not all bisexual and gay guys like other guys semen. Those bisexual/gay guys who like other guys semen... like it a lot.
this kills sperm cells
No it can not.
From what I know, all the guys have to do is release the sperm inside a women and it goes into their womb.
Sperm cells become potent around the age of seventeen and eighteen.