Nearly five years ago, an article in the Stir about singer Harry Connick Jr. giving his then-8-year-old daughter a kiss urged parents to stop smooching their kids lip-to-lip. Today, the debate still ...

Lip kissing is an act that’s so natural and common in many present-day societies it is easily taken for granted. But it’s not actually clear whether people have always been kissing, or whether its ...

Sophie Lund Rasmussen has received funding from the Edubba Foundation and the Carlsberg Foundation. Troels Pank Arbøll has received funding from the Edubba Foundation and the Carlsberg Foundation. Lip ...