It starts with "Chi" and ends with "Ko".

A black thing that all the girls love. What is it?

Nope.

DICKS! /chinko/. One can only assume the answer is Chocolate /choko/

No, there's no need to explain.

Hint - You roll it around your tongue and taste it...

No, it's gotta be dicks, right? I mean, the girls that Akigumo draws all go "Dicks are so delicious" and stuff.

And while tasting it with their tongue, they go "This peni-