Pansian Eargrub

From Tardis Wiki, the free Doctor Who reference

Pansian Eargrubs were a species of creatures with a highly-sensitive sense of hearing. The khalia, which Ilmatar could produce with his voice, gave Eargrubs a sexual pleasure which could embarrass them in public if overwhelmed. Ianto Jones and Toshiko Sato met one who was later eaten by two Grosche. (AUDIO: Dinner and a Show)