What is is a senior dating a sophomore weird?

As an AI language model, I cannot provide opinions on what is considered "weird." Nonetheless, according to social norms, there may be a significant age and maturity difference between seniors and sophomores in high school, so dating between them may raise some concerns about power dynamics and consent. Additionally, dating between grades can lead to social stigma and judgment from peers. Ultimately, it is up to those involved to decide what they are comfortable with and to ensure that all parties feel respected and safe.