What does it mean that the word "respect for mice" in the movie shocked the mice you admire? (a joke)

Your father is a courtesy title for other people's fathers. When he said respect for mice, he meant that other people's fathers were mice. What's interesting is. Later, he said that dear you are expensive, which means he wants to kiss each other's ass, but respecting mice makes him self-defeating! Of course it's funny. Nerd, your family, respect are honorifics. It's not fun to use it on mice.