InChrist
Free4ever
Because He is sharing with her a spiritual lesson concerning eternal life using water as an illustration, which she already understood was necessary for physical life ...Why is Jesus thirsty and not drinking the water he's offering to the woman at the well.
Why does he ask her to draw water for him and he will draw water from her?
John 4:14
but whoever drinks the water I give them will never thirst. Indeed, the water I give them will become in them a spring of water welling up to eternal life.”
On the last day, that great day of the feast, Jesus stood and cried out, saying, “If anyone thirsts, let him come to Me and drink. He who believes in Me, as the Scripture has said, out of his heart will flow rivers of living water.” But this He spoke concerning the Spirit, whom those believing in Him would receive; for the Holy Spirit was not yet given, because Jesus was not yet glorified. John 7:37-39
"Here Jesus refers to the Holy Spirit as the living water. External influence of the Spirit had always been given in the conversion and sanctification of the Old Testament saints and prophets, but the gift of the Spirit who would indwell believers had not yet been received (Acts 10:44–45). So, though many people say that Jesus is the living water, Jesus Himself intended the phrase to mean the Holy Spirit who dwells in believers and seals them for salvation (Ephesians 1:13–14). It is the ministry of the Spirit, flowing out of a heart redeemed by God, that blesses believers and, through them, brings life and light to the world."...https://www.gotquestions.org/living-water.html