Why was it against the law for blacks to kiss whites in 19th century?

In the 19th century, laws prohibiting interracial interactions, including kissing, were rooted in systemic racism and the belief in white supremacy. These laws aimed to uphold the social order that marginalized Black individuals and maintained racial segregation. Such prohibitions were part of broader efforts to control the behavior of Black people and reinforce the idea of racial inferiority. Violating these laws often resulted in severe penalties, reflecting the deep-seated racial tensions of the time.