To make the kiss look more realistic, actors often kiss attaching to the lower lip and gently sucking.
Take a look: Happy birthday Daniel Radcliffe - the best Harry and our legendary wizard.
Harry was an orphan, and Cho was only 14 when she discovered that her boyfriend Cedric Diggory was murdered on the orders of Lord Voldemort.
What has Daniel Radcliffe done since playing the titular character in? Together with Love to See It hosts Emma Gray and Claire Fallon, they spend an episode dissecting the seventh week of the summertime Bachelor in Paradise series.
There are better stories to tell here on Earth, after all.
However, his girlfriend Erin Darke was not aware of the scenario.