A corny relationship is one that is based on cheesy, over-the-top displays of affection. This can be anything from public declarations of love to grand gestures like buying flowers or taking a romantic vacation. While some people may find this type of behavior endearing, others may find it to be too much.
Corny relationships are often characterized by a lot of PDA (public displays of affection). This can be things like holding hands in public, kissing in public, or even just always being touchy-feely with each other. Some people love this type of attention, but others may feel suffocated by it.
corny behavior can also manifest itself in the form of grand gestures. This might be anything from buying expensive gifts to planning elaborate dates. Again, while some people love this level of romance, others may find it to be excessive and/or overwhelming.
ultimately, whether or not a relationship is considered corny is subjective. What one person may find to be sweet and romantic could another person find to be cheesy and over-the-top. It's important to gauge your partner's comfort level with this type of behavior before engaging in it yourself.