Harry Styles and Taylor Swift recently gave each other tonsil exams over dinner with a group of friends in New York City, because that's what 15-year-olds do when they only have so much time to kill before their parents pick them up.

(Dude, don't give us that "but she's almost 23!" business. We're talking mental and psychological age here.)

Us Weekly reports that Swift took Styles, 18, to a pal's birthday party in the Big Apple Thursday night (Dec. 6) that was also attended by 'Glee' actress Dianna Agron and Swift's BFF, actress Emma Stone.

Swift and Stone joined friends at the theater for 'Sleep No More' before heading to a meal with a group of about 10 people, including the One Direction singer. And then they got gross.

A source told the mag that the 'Red' singer was "all over" Styles and that they made out in the middle of the meal. Blargh.

Maybe she just figured this was a slightly more polite way of marking her territory than peeing a circle around him.