The man's reproductive organs that porduce semen are in no way connected to the anus or digestive track. Whatever it is that is coming out the anus that's not feces has to be digestive juices. Or are you asking if it's natural to fart semen. Ok, so having semen in one's anus is not natural because that's not where it's supposed to be therefor farting semen is NOT natural.
Without being judgemental about you in the slightest I'd simply answer that the only way that you could fart semen out of your backside is if someone has deposited it up your backside. Your own semen won't get there unless you put it there.
yes, of course
Consuming your own semen will do you no harm.
Some people are naturally "genteel".
It is impossible to do. Females simply can and do not produce semen.
Men and woman fart about 14 times a day
Yes, men who have had vasectomies still have DNA in their semen. The vasectomy procedure blocks the vas deferens, the tubes that carry sperm, preventing sperm from reaching semen. Semen is still produced by the body, but it does not contain sperm.
yes
No, they don't.
Mixing semen from two gay men does not result in any unique or different outcome compared to mixing semen from individuals of any other sexual orientation. Semen is primarily composed of sperm and seminal fluid, and mixing semen from different individuals would not affect its basic properties or functions.
No.
He's fat and overwieght and he eats people, so yes, he should naturally.
no. most men continue to produce semen through out their life time, well into their seventies and eighties.