Hmmm well we know the adult characters had more or less of a risqué backstory. Danny eloped with Pam at 18 and Jesse was more or less a womanizing wild man before he settled down. I don't know about Joey or Becky but I'm sure they might have had their "adventures" too. As for the rest of the characters on the show, that sort of enters creepyville. lol Well, actually, in "The Apartment", we learn Kathy Santoni is having a baby so it's pretty obvious to assume that as a teenager she slept out and ended up a pregnant teen. I thought it was interesting how on a few episodes they did hint at some very adult situations that the kids watching didn't exactly get but the adults watching did. I don't really think I want to try and suggest where Michelle or Stephanie has been because, like I said, creepyville. I'm sure if Bob Saget wasn't joking about getting the rights to the show and making a movie, he'd probably explore all of that. o.O