Hah, really? I can think of a few scenes they can watch from "family friendly" 70s Muppets.
-Someone on the show (maybe Kermit or Fozzie) called Raquel Welch "sexy" when she had her guest spot. BONUS: Have a Raquel Welch dance number where she's in a dress featuring a fair amount of cleavage. [https://www.youtube.com/watch?v=7fGQRnEvhfA]
-Kermit calls Linda Ronstadt "a foxy lady" in front of a jealous Miss Piggy
-Elton John at his Elton John-iest [https://www.youtube.com/watch?v=iL3mYAsEp9g]. By no means "smut" but OMM I know isn't ok with the gays.
-Alice Cooper doing his thing on the show [https://www.youtube.com/watch?v=iz0lXNNkqac]. One of my personal favourites, actually. A kid would have a blast with Alice Cooper's show, but perhaps one of the less "wholesome" episodes. If I remember right, I think Piggy had the hots for him too.
-Didn't Charles Grodin point a gun (like, an actual legit-looking gun) at the Muppets while holding Kermit hostage? Why yes, yes he did. [http://www.imfdb.org/images/thumb/6/65/GMC_SW36_02.jpg/600px-GMC_SW36_02.jpg]
-Kermit: Dat ass tho! [https://youtu.be/m-WAhdvygpE?t=3m26s]
And those are the ones I remember. I know for a fact there are more scattered across The Muppet Show, Sesame Street, and other Jim Henson properties. Though to give them credit, I thought they were going to comment on how God won't permit the pairing of bear and woman.
Also love how being "a pro-choice feminist" is wrong, and yet they don't comment on Kermit being the victim of spousal abuse for decades.