The overview of Season 1 has the following 24 clips that appear in the 31 seconds for
"Undressed... to be continuted?" are:
Veruca and Dave after sex.
Gina using her vibrator.
Jared giving Tina and Gwen carrots to suck on.
Mr. Fuzzy carressing Emma's body.
Emma and Brian kissing.
Kiki Undressing infront of Dean. (Dean's first time)
Liz giving her panties to Z.
Z giving his underwear to Liz.
Todd and Annette kissing.
Evan trying to kiss Cliff.
Ned kissing Brick (Episode #126)
Joel kissing Andy (Episode #126)
Samantha and Joan kissing after they fought (Episode #126)
Jenny kissing Ross.
Jared, Doc, and Z in their underwear.
Jake and Sarah kissing.
Rory wearing the bra, while Jana laughs at him.
Claire undressing infront of Dean.
Liz and Debbie french kissing.
Dee and Jacking kissing.
Katie kissing Dave on the couch.
Katie and Ollie kissing.