No, it is impossible for every single human on this earth right now, and all humans that have lived. Living a life without sin is 100% impossible. Pretty grim.
However, there is one Human that defeated the spiritual virus of sin, and was able to perfectly live a life free of sin. For this, Christians worship this Human as our King, because His life, death, and resurrection vindicated the human race in the eyes of God. His name is Yahoshuah (Jesus, Immanuel, Christ, Messiah, etc.) So, we have victory through Christ's sacrifice for us - blamelessly dying for our evil and debauchery to ransom our souls from hell (lifelessness, death, corruption, etc.)
I have a question: Why is it that when christians bring Jesus into a conversation, so many of them feel the need to phrase it like they are telling you a secret or something? I heard the 'Good News' when I was like, five. It's not news anymore. Presumably if you're on a christian website, you're aware of Jesus and his 'sacrifice' (went to a place of eternal happiness and bliss for our sins. Poor guy.) So why the dramatic reveal? I don't get it.
To answer the question for the post, masturbation and [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] without the consent of God (i.e. outside of love making with a committed partner) is forbidden. As images of God our seed is a reflection of holy progeny. So, to waste it is ludicrous to God: our seed is meant to produce children. A tree doesn't drop acorns with no hopes of [some of] them growing into trees, and dandilions do not release spores with no hopes of future generations. We, as humans, should not "drop our acorns" for no reason either.
You... are aware that the male body produces sperm constantly, and that most of this sperm goes to waste, right? Sperm only lives a couple of days after they have matured, and if they aren't [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] then they die anyway and are taken care of by your body's immune system. And besides that every time a woman has a period she's dropping off an acorn... right?
Besides all of this, you lose so many nutrients by [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] if you are not having intercourse. Men lose 1/3 of their daily value of zinc per [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse]. Zinc is important in immunity. Proteins, sugars and other nutrients and minerals are surged into feeding the sperm so that when it is time to [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] the sperm will be healthy - but you lose this if you spill/waste your seed.
Oh gosh. I guess I'd better give my boyfriend more (Censored version: happy tongue massages) during flu season!
The typical guy [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] one to three teaspoons of material. We lose a heck of a lot more than that in nutrients by not re-digesting our own poo (as a large percentage of the animal kingdom does, since our inefficient methods of digestion mean that much of the good stuff we eat is literally wasted). I guess the lesson here is if you eat plenty of spinach, you can jerk off to your heart's content. So that's why Pop-Eye had such big forearms!
If you have intercourse with a female, the way God designed it (without a condom), the female vaginal fluids replenish most all of the nutrients lost in [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse]. So, intercourse for procreation with your mate is both divinely correct, and medically ideal.
First off, vaginal fluids are not chemically equivalent to sperm. Rather than being accommodating to sperm, those fluids are actually harmful to them. Vaginas are not sperm-hospitable places, because that way only the strongest, best sperm get through to the egg alive. Secondly, if you could replenish nutrients and such through the skin, couldn't you just wipe your sperm on your own skin to get back what you lost? If you're going to make up medically impossible scenarios, you may as well take them to their ridiculous conclusions.
Also, nothing you've said relates to female masturbation. Am I losing vital nutrients every time I beat the bush? I never knew!
If you want to believe masturbation is a sin, go right ahead. But at least recognize that there is no
medical reason not to do it.