These people are so annoying. Hell, I get annoyed if I see a couple do this and it's been a month since they've seen each other, much less an hour (especially since a lot of the relationships don't last anyways).
I'd give them a hug and a quick kiss. Although my first boyfriend, he had a seizure in gym class one day, and he had to be taken to the hospital. Happened a few times already that year so after that I hugged him a lot longer
just hug in the corner
...and that is the fact that rain isn't going to be enough to wash the blood out of his pants.