The sexual act of a man inserting his penis into his lover's ear canal.
(Quoted from SNL) Catherine whispered into my ear, her breath rich with faraway spices, that she desire to make love. She wanted to try shinshi shinshi. Now, I'd been begging her to try sinshi shinshi
for months. She'd refused on the grounds that it was unclean. Finally, she was willing to accept her lover's body in places no one had ever trespassed. Specifically, the ear canal.