Zack is suddenly the dog that caught the car. In the mood? Yes. Permission? Granted. Now what? Well, simplest thing to do now would be to just go for it, right?

The only warning he manages is the brief tightening of his hands on Cloud's hips. Then he's closing what little gap is between them to kiss Cloud. It's a eager, maybe at the edge of rough, but that's just Zack in general.