like everything, it takes practice hang in there
drink a cup of semen because winter is coming
Your body digests the semen so there is no way.
There is very little calories used up in the making of semen. There is nothing in the release of semen that is going to affect muscle growth or retention.
The urethra is the passageway for semen as it leaves the male's body. In the male, the urethra carries semen and urine, while in the female the urethra only carries semen.
Conserving semen has no benefits. It is a myth (wrong belief) that conserving semen is good.
The same as anything else you digest
wetdreams
No semen does not cause any body pain at all.
Generally speaking, you can't. Your body will produce and emit sperm when it wants to, whether you consciously want it to or not. The same with semen. When your body becomes aroused, regardless of the reason, semen will be produced and often be emitted for cleansing and lubricatory purposes in preparation for sex. This is not a conscious function.
Yes, the semen is excreted in the form of faeces or urine.
None. Your body produces more semen every day.
Somewhat. It taked the body some time to "reload", so if you get off more often that that you will get smaller amounts.