I didn't know until now, but asking people to prom is a really big thing. Teens are super into it, especially in the South. From looking at the #promposal tag on Instagram I came to the conclusion that teens who do promposals are really into:
1. Chick-fil-A
2. The movies Up, Frozen, and Despicable Me
3. Starbucks
4. Nike running shoes
5. Candy, in general
6. And painting on horses
With that, here's a compilation of my research + photographic evidence: