Kissing a romantic partner is a nice way to share an intimate moment – not to mention a hearty dose of saliva and tens of millions of oral microbes.

Some people naturally possess traits that make them more likely than others to take their time and fall in love slowly.

Throughout college, the subject of love and relationships are a reoccurring theme. Between real-life conversations, references in media and seeing couples’ hand-in-hand on campus, it can feel like lov ...