When you stand up and tell your date you are going o the toilet, 'spontaneously' kissing them from a raised position, catching them by surprise and leaving them with a world of possibility, confidently swaggering away to de-foul the establishments facilities and contemplate your influence.
When you are taking a dump, poo, duke, you know… a shit and a big one plops down into the toilet bowl causing a splash. When this splash of water reaches up and tickles the balls and kisses the taint is called a Poseidon’s Kiss. Just a gift from the god of the sea to wish you luck on your next adventure.
While using the airport bathroom and squeezing out a massiveduke, he was blessed with a tender Poseidon’s Kiss.