Audrey set down the drink can and yawned. Jen watched her closely to see what happened, but it was very subtle. Audrey's ears were curling inward, folding in on themselves until it was clear what they had become: vaginas. Audrey reached a hand up to one and idly stuck a finger in it, moaning. She reached down into her backpack, mumbling, "Gonna listen to some music..."
Out of her bag, the gamer girl pulled a set of headphones, but with a twist. Instead of speakers covering her ears, there were dildos. Audrey stuck these inside her ears, turned them on, and started moaning as the dildos vibrated, sending waves down her earpussies that her brain interpreted as sound. It was no less pleasurable than normal masturbation, though, so Audrey was able to stay awake, quietly moaning as class began.