Jon and Kate Gosselin can't keep their hands off each other in old footage from when they first met -- as shown on John & Kate Plus 8.

"I liked bad boys," Kate says.

WATCH THE JON AND KATE "HOW WE MET VIDEO.

Adds Jon: "[Before Kate], I was doing nothing with myself. No career, I worked at a ski slope...I didn't have any goals. I didn't want to get married, didn't want to have kids. Just bumming around, doing what I wanted to do."

See Jon and Kate's family album.

Kate says Jon had a girlfriend when they met, but "she was gone the next day!"

How long did it take them to get serious? "One day!" Kate says.

Check out photos of stars who got caught cheating.

The pair also display serious PDA as they open Christmas presents in one clip, and cry as they say their wedding vows in another.

See stars' grossest kisses.

"We were the couple that people always said were sickeningly sweet," Kate says.

"I don't know what happened," Jon deadpans.

See photo of reality love gone bad.

The newest issue of Us Weekly reports Jon grew so suspicious of his wife's "inseparable" behavior with her bodyguard Steve Neild, he considered hiring a private investigator. Meanwhile, Jon carried on an affair with a 23-year-old teacher, Deanna Hummel.