Introduction of the penis in a partner's skull via the ear. A relatively rare fetish but with dedicated fans, usually limited to non-realistic art (drawn or written).
In an ideal world, Jessica Rabbit would climb on stage and give us an earful. Then, Roger would climb up and give her an earfuck.
Annoying commercial advertisement with loud or piercing noise, over-emphasis on spoken words or otherwise excessively distracting to the point of inducing rage.
Have you seen the new car insurance commercial? It's such an earfuck that I had to mute the TV! I will hate that company forever.