In erotic muscle growth fiction, one of the most popular vehicles authors use to transform guys into big muscle studs is simply the act of eating cum. Sucking cock. A guy sucks the big dick of a transformed man, and then he is transformed - made into the image of the super man.
Sometimes the power to transform stays within the the original super stud, but my favorite stories are when the power travels like a virus from man to man, transforming exponentially. The free gift is available to everyone, but you must be willing to humble yourself in order to receive it. Most of the stories have at least one character who is too proud to submit - at least at first. The eventual humiliation and repentance of this character - his willing acceptance of the gift - that's a classic biblical theme - The Parable of the Prodigal Son (Luke 15:11-32) revisualised as gay porn!
Of course, human semen doesn't have the power to literally transform people. It has the power to continue our mortal species, which is a miracle all its own, but it falls a tad short of the author's fantasies. On the other hand... what about the semen of a god?
Egyptian creation myths are many and varied - reflecting the flux of their religious beliefs. One of the most common begins with Nun, the primeval ocean, from which Amen rises in splendour. He takes the name Ra. By an act of masturbation (described as such in the temple texts) he creates the original universe.
In Frank Herbert's Dune, the great sand worms of Arrakis create a substance called "spice melange" - a substance that among other attributes, imparts long life and the ability to see the future, even to "fold space" (warp speed). The native Fremen believe that the actions of the sand worms are the direct actions of God, and so the worms have been given numerous titles such as the Great Maker, the Worm who is God, Old Man of the Desert, Old Father Eternity, and Grandfather of the Desert. Just what IS spice? It might be the semen of the worms.
Manna - literally "What is it?" in Hebrew (AKA "Ambrosia" to the Greeks and "Mfkzt" to the Egyptians) was the food that the Israelites ate while roaming the desert for 40 years. It was a bread-like substance that fell from the sky every night, and was collected every morning.
In the Zohar (written as commentary on the Pentateuch in the 13th century) The "Ancient of Days" (sounds like "Old Father Eternity") is described as if it were a supernatural Manna producing machine - with twin orbs and a penis - and guess from where the Manna flows.
But whosoever drinketh of the water that I shall give him shall never thirst; but the water that I shall give him shall be in him a well of water springing up into everlasting life.
-- John 4:14
The Spirit and the bride say, "Come!" And let him who hears say, "Come!" Whoever is thirsty, let him come; and whoever wishes, let him take the free gift of the water of life.
-- Revelation 22:17
The Samaritan woman said to him, "You are a Jew and I am a Samaritan woman. How can you ask me for a drink?" (For Jews do not associate with Samaritans.)
Jesus answered her, "If you knew the gift of God and who it is that asks you for a drink, you would have asked him and he would have given you living water."
John 4:9-10
Just as the living Father sent me and I live because of the Father, so the one who feeds on me will live because of me.
This is the bread that came down from heaven. Your forefathers ate manna and died, but he who feeds on this bread will live forever."
-- John 6:57-59
Reading between the lines, I wonder, just what IS the Water of Life? It sounds like the Water of Life is the same thing as Manna - but not just any old Manna - Super Manna! The bread that gives eternal life. In all these erotic stories, the semen has the power to "glorify" a man, to transform him into something far greater than he was before. I think these writers of homoerotic fiction are telling us exactly what the Water of Life really is, and from where it comes.