Aurilingus

Oral stimulation (kissing, nibbling, tonguing, etc.) of a partner's ear. Following the pattern of "cunnilingus," the word comes from Latin auris 'ear' + lingere 'lick.'

Not to be confused with the recent Urban Dictionary word of the day, "earlingus," which means the same thing, but somehow just sounds lowbrow.

Janisha: Terry gave me some sweet aurilingus last night! She said I tasted like chestnuts.
Xiuying: Hold on, you mean oral sex?
Janisha: Aural, yeah. It was hot.