However, it's important to note that:
* The anime and manga often differ in detail. It's possible that a kiss was depicted in one version and not the other.
* Cultural context. The series is Japanese, and public displays of affection are generally less common than in some other cultures.
* Focus on action. Dragon Ball Z primarily focuses on action and adventure, leaving romantic relationships in the background.
Although a kiss might not have been explicitly shown, it's fair to assume that Goku and Chi-Chi share a loving and intimate relationship, even if it's not always overtly expressed.