About the only "naughty" humor on Laugh-In was when Dan Rowan would toss Dick Martin a suggestive lead-in about his date "the night before". It never went much further than that. There was a lot of tongue-in-cheek humor but I would not have classified it as "naughty". Even the bikini shots were "tasteful".
Yeah - well this was the era in which Barbara Eden had to cover her navel, for I Dream of Jeannie, per the NBC censors. There would be chuckling among dirty-minded boys like myself in school on Tuesday (Laugh-In was Monday night, IIRC) - along the lines of what "sock it to me" could have meant - what a "bippy" was, etc. But you're right, any 'naughtiness' on the show was implied, but never blatant.