To kiss someone with love or affection.
Smooching is a sweet and loving thing to do.
Examples:
I like to smooch my mom goodnight.
The prince and princess smooched in the garden.
She smooched her dog on the head.
The cat and dog smooched each other on the nose.
I saw two elephants smooching at the zoo!
The bear and the bunny smooched and it was very cute.