1.) They were too corny.
2.) He whispered sweet nothings into her ear.
3.) Aww, shucks!
4.) He breathes on Nebraska!
5.) Corn-gratulations.
6.) They are both Cereal Killers!
7.) Because the potatoes have eyes, the corn has ears, and the beans stalk.
8.) It has lots of kernels.
9.) A corn-ival...