The first kiss? 50,000-year-old kiss painting found in Brazil’s Serra da Capivara
Jerusalem Post
“The paintings not only depict everyday aspects, such as hunting and rituals, but also show affectionate and social interactions, such as records of sexual acts, kisses, and hugs,” ICMBio stated.
https://www.jpost.com/archaeology/archaeology-around-the-world/article-843477