Form field hints with CSS and JavaScript

Example 1: An unstyled form.

The form below is definition list with form elements (labels, inputs, and selects) and a span of text to serve as the field hint.

This is the name your mama called you when you were little.
This is the name your sergeant called you when you went through bootcamp.
The thing with the @ symbol and the dot com at the end.
Pick a famous year to be born in.
Between 4-12 characters.
Between 5-13 characters, but not 7. Never 7.