after the cell saga, android 18 was way too rough on krillin, and krillin decided to leave her. It was the same with goku. After his wife treated him even MORE badly, goku decided to leave her. Then, goku and android 18 have met. Android 18 loved that goku was tall and muscular, while goku just loved her for not being mad all the time. They are now at an amusement park for a date

Goku: hey, 18? How come when I was inside you, I didn’t feel any gears? Aren’t you a robot?

Android 18: GOKU!