In a love story, culturally distant and a bit strange to us, Jacob is enamored by the fetching Rachel. In an act of service, to garner her attention, he rolls away a stone from the mouth of a well to provide life-sustaining water for her sheep. It works and she becomes his bride.
In another love story, also culturally distant and a bit strange, Jesus, in an act of service sacrifices himself for those he loves. Three days later Jesus is resurrected and an angel rolls away the stone that sealed his tomb, effectively providing living water for his sheep; that would be us. It works and symbolically we become his bride.
The water is provided as an act of love. We drink the water to accept the love.