But in Hollywood, all of the dating rules are different.Because Hollywood is so small and everyone is connected, tons of celebs ends up dating the same people, and cutie Taylor Lautner and Selena Gomez met when they were both filming movies in Vancouver in 2009 and were feeling a little homesick.The couple had a whirlwind romance before breaking up less than a year later, but the duo eventually found their way back to each other earlier this year, and have been ultimate #relationshipgoals ever since. Born on February 2, 1992, in Vancouver, Canada, Avan Jogia is one of Hollywood's rising stars.On-screen, they played a high school couple who were totally obsessed with each other, and irl, things were basically the same.Taylor squared, as they came to be known, dated for just a few months in 2009 before their relationship eventually fizzled.Even though Gigi is admitedly closer to Kylie's big sis Kendall, sharing an ex doesn't seem to have gotten in the way of Gigi's friendship with Kylie or Kendall.
Emma started dating actor Alex Pettyfer when they met on the set of their movie in 2008, and things got so serious, Alex even got Emma's name tattooed on his finger.
Just a year later, Zoey was linked to Avan, and they've been inseparable ever since. For some reason, Taylor Swift and Kendall Jenner both kept their relationships with Harry Styles under wraps (unlike any other living, breathing human would), but we'll never forget they happened.
Taylor and Harry were first linked back in December of 2012, and even though they only dated for a couple of months, their romance inspired half of Taylor's 1989 album.
CENTURY CITY, CA - MAY 02: Actors Avan Jogia (L) and Zoey Deutch attend the 21st annual Race to Erase MS at the Hyatt Regency Century Plaza on May 2, 2014 in Century City, California.
In the words of Gretchen Weiners, "Ex-boyfriends are just like, off limits to friends" — and that's usually true, in the real world.