"Alicia, honey..." you say, examing your hands carefully. Perhaps it's the oil effecting you, but you've got the idea. You understand what is to take place here and you slowly nod your head.
"Yes?" She asks, turning back to face you. "Oh... oh my God! Your hands..." she slaps her hand to the leg you just massaged, and screams. "What's going on?!"
"We are to be the seeds of a new race, you see?" You say, the ideas coming to you as flashes, images of the ocean and cities yet to be constructed.
"Wh... what? What are you...?" She stammers, confused.
"It's the oil. Can't you hear it's call? Calling us to the ocean... to breed, to bring about a new race on this earth... able to exist above as below... amphibious... perfect." you speak as if in a trance.
"N... no.... yyeess... yes, I do hear it..." a slow smile creeps across her face. "Let's finish our evolution and go to the sea." She reaches for the bottle as you tear off your clothing, eager to be rid of base humanity and transcend to the next level.
She smears the oil across your chest, hastily, sloppily, before pouring it over her own and rubbing it in. After some time, your naked bodies are covered with the oil, dripping green from head to toe. You can see some signs of your evolution, the fins on your forearms, the dorsal fin protruding atop her head and presumably atop your own as well, and her shining yellow eyes. You can't be sure, but it looks like her nose has flattened into her face.
"Well..." she says, her voice both emanating from her vocal chords and ringing in your mind, "I guess it's time to shower off and see the effects, huh?"
"Yeah. I... I feel eager... I want to see what we are."