A nookie is a kiss or a cuddle, especially between people who like each other.
Nookies are usually seen as sweet and affectionate.
Examples:
He gives her a nookie before bedtime.
She likes to give her teddy bear a nookie.
The puppy gives the little girl a nookie.
The cat and the dog give each other nookies.
In some cultures, people give nookies to say hello.
The mommy and daddy give each other nookies.