Different people have different ideas about what is beautiful.
Eric: I can't believe Marc bought that ugly old van.
Dwayne: He loves it. Beauty is in the eye of the beholder.
beauty is only skin-deep
A person who looks beautiful may not have a pleasing personality; a person's good looks may not last.
Jiho: I hope Nancy will go out with me. She's so beautiful! Kim: I hate to disappoint you, but in Nancy's case, beauty is definitely only skin-deep. She's not very likeable.
(the) beauty of something
a quality that makes something good, easy, or of value
One of the beauties of e-learning is that you don't have to leave the house to learn.
have to go to get my beauty sleep
a phrase announcing one's need to depart because it is late.
Bella: Leaving so early? Eric: I've got to go home and get my beauty sleep.
age before beauty
a comical, teasing, and slightly grudging way of indicating that someone else should or can go first.
"No, no. Please, you take the next available seat, age before beauty, you know."
Read more in my blog - and watch a fascinating video !