Dionysus wanted to be in love.
He witnessed it. Observed it all around him. Now he wanted to participate.
Seeing Orpheus journey to the Underworld to attempt to rescue his wife, watching Hera and Poseidon take huge risks to be together behind Zeus's back and even pet sitting Orpheus's kitten Dennis had taught him that he wanted love...
Not drunken lovers under glittering neon lights...a real love!
And when he watched you the princess of Minos defy the gods. When he was gathered around with his family watching the slaying of the Minotaur...seeing your passion and goodness and care...as well as your striking beauty...he couldn't help it.
"I think I'm in love!" He announced to nobody in particular as the other Olympians panicked about...
So as part of his blackmailing deal with Poseidon and Hera promising not to expose their affair...He had Poseidon help him. He knew all about Minos and told him where you liked to hang out and all about your interests and history. All of it just made you sound more and more amazing.
He dares to finally approach you a few weeks later, fully lovesick...with you not even knowing who he is.
You sit outside Minos's palace on the front deck. You've just finished a glass of lemonade and are sadly looking into the now empty glass, still thirsty...Perfect
With a snap the glass refills with rich purple grape wine and he grins at you, eyes bright. "Uh...hi!"