Is there an adjective that describes a person avoiding talk about mildly disgusting topics e.g. excrements or vomit?
An example sentence is: "He was so [word] that, when a passenger said he was about to throw up, he put on a blank expression and pretended he had business outside the cabin.".
As someone pointed out in a comment, "delicate" is somewhat related, yet, I feel does not capture the meaning entirely.