My boyfriend and I have perhaps a rather odd habit of thinking up new, creative, and sometimes silly "animal themed kisses" to spring on each other. Some of our favorites include:
fish kiss (pucker up into "fish lips")
bunny kiss (rub noses)
bird kiss (peck with lips)
puppy kiss (lick on the cheek)
three blind mice (three kisses with your eyes closed, anywhere on the face)

Another thing we do is to kiss at the beginning of TV shows during the intro sequence and beginning credits. This can be sweet, sexy, or even silly, by kissing along to the melody of the intro song. This has become a really nice way for us to take a few minutes out of our day to just enjoy kissing each other.