“Kinder” is most commonly used regarding a male’s package/genitalia.It can also be used regarding women genitalia.
When you meet someone new and have not seen the “kinder” before. You know you are getting your "sweet fix"... but what the prize is;is unknown until you unwrap the foil.
Can be used in phrases such as:
Girl 1: “I made out with a new guy hard core last night”
Girl 2: “Ohh ya… how was that?Did you check out his Kinder (aka Kinder Surprise)?”
Girl 1: “Dam yes, and it was an awesome surprise..I wish I could take a picture and place it on the top of my computer”