// He got upset because while he is perfectly fine with Latula showing off her body (she's very attractive) It's the framing of "YOU'RE LUCKY MAN" and just a bit of a complex around the fact that she's stuck it out with him even though he's not completely the same after his accident. He's got unstable moods, lashes out, is short-tempered, and can't really sometimes control his impulses like he used to, and Latula is patient as hell with him and still loves him. So in some ways, he is aware he's very lucky he got someone so patient and deserving, but he also thinks people probably think of him as a burden to Latula.
((I really love their relationship, it's got a lot of nuance people ignore, especially when they reduce Mituna down to a flanderized version of himself, or treating him like some sort of victim who "can't consent" to being in a relationship. Love these two to death))
// YOU GET IT!! Yeah, I love Mituna and Latula 😭!! People tend to write mituna as completely incapable of taking care of himself or that he's not cognitively capable enough to be happy in his relationship!! It's a bit frustrating! Like he's happily in a relationship with someone who accepts him and vice versa, and she's happy with him regardless of the reason they are together!!! People act like relationships can't have obstacles or challenges and also be healthy!