a leopard can’t change its spots

(proverb) a person cannot change who they are, a person cannot change their identity

Example Sentences:

Son: I want dad to go skydiving with me.
Mom: Why?
Son: It is fun, and I want him to experience something new.
Mom: Oh, son, a leopard can’t change its spots. Your father has never gone skydiving before. He’s not going to start now!

Wife: Would you like a cup of coffee?
Husband: I only like tea.
Wife: But I like coffee. Couldn’t you just try to like coffee?
Husband: I prefer tea. A leopard can’t change its spots.
Wife: I want a divorce.

From the Blogs:

A leopard can’t change its spots, and neither can an ugly duckling

Media:

Similar idioms:

1. you can’t teach an old dog new tricks
2. not one’s cup of tea
3. beauty is only skin deep
4. check in with
5. on second thought
6. change one’s tune
7. got a screw loose
8. open up a can of worms
9. change of pace
10. pick up the check
11. change of heart
12. fancy
13. not all there
14. pick up the tab
15. off one’s rocker