I rented one volume in the series one time (I can't remember which one, unfortunately--I believe it was like #12 or 13, one that had 2 tickling loops featured on it; one, I think, was an old Tao production called "Tied, Tickled and Spanked").
This was years ago, and I don't remember too many details - but the tickling was very casual, no bondage. It was basically just a couple of girls playing around, about on the level of what you might see at any college party, except that the girls were naked. One girl's soles were really dirty, I do remember that. And there was no dialogue or sound, which makes for a rather odd effect; these were very short, simple little films designed to played on one's home movie projector or in a machine in an adult bookstore. They're of historical interest, but that's about it. They're not the 60s version of Tickling Paradise, unfortunately.
Incidentally, I met Mike Vraney (the guy who runs Something Weird) briefly while I was in Seattle. Very nice guy, and his catalogue has a lot of very interesting stuff in it. Highly recommended if you're looking for weird/fringe film from the 60s-70s.
C