The amount of money that you spend on a present should be in direct proportion to the amount of affection that you have for that person.
8616 seconds sound clip from the Be My Valentine, Charlie Brown movie soundboard.
You can hear this line at 00:04:42.583 in the DVD version of the movie.
Quote context
[...]
- Oow! Are you sure you want to risk losing me?
- Wow! A heart-shaped box of candy.
- I'm buying a valentine for Miss Othmar, my teacher.
- It's kind of expensive, isn't it?
- You'd better be careful, Linus. It's not a good idea to fall in love with your teacher.
- I didn't say I was in love with her. I merely said I'm very fond of the ground on which she walks.
- What do you give a man teacher for Valentine's Day?
- Do you have any heart-shaped shaving lotion?
[...]