Regarding Yamcha and Chichi, when we were first introduced to Chichi in the first Arc (the Dragonball/Pilaf Arc), Chichi had just killed a dinosaur by decapitating it and laser blasting it. Yamcha knocked her out before she could hurt him; after learning her identity, he went to check on her and the best excuse he could come up with was that he a teenager liked this girl. Now that he's with Bulma and she accuses him of being a womanizer, Chichi has "turned him down" in front of Bulma, making her suspicious of Yamcha's intentions. Throughout the remainder of Dragonball, Chichi wants some PDA with Goku, but Goku gets annoyed not understanding it. In Dragonball Super, there is a scene where it is revealed that Goku has never kissed Chichi, which feels annoyingly plausible.
Regarding Yamcha and Chichi, when we were first introduced to Chichi in the first Arc (the Dragonball/Pilaf Arc), Chichi had just killed a dinosaur by decapitating it and laser blasting it. Yamcha knocked her out before she could hurt him; after learning her identity, he went to check on her and the best excuse he could come up with was that he a teenager liked this girl. Now that he's with Bulma and she accuses him of being a womanizer, Chichi has "turned him down" in front of Bulma, making her suspicious of Yamcha's intentions.
Throughout the remainder of Dragonball, Chichi wants some PDA with Goku, but Goku gets annoyed not understanding it. In Dragonball Super, there is a scene where it is revealed that Goku has never kissed Chichi, which feels annoyingly plausible.