Un-dirty

An Un-Dirty Story —Down at the laundry, —When all the work’s done, —We swim in the washers, —It’s all good, clean fun! —We take off our oxfords, —And throw out the duds, —And have our refreshments— —A scuttle of suds.

Source: wiktionary

We found it a fairly readable book, refreshingly un-dirty in an age of over[-]sexed literature.

Source: wiktionary

Equally often, by Thurber’s words, drawings and thought, it draws you backward into the world of un-dirty humor, leaning you backward in your seat to laugh at the world and at yourself.

Source: wiktionary

Having just walked out of the Aquarius and having just sat through a grand and wonderful experience, I feel I must share it with you . . . First, if anyone says the nude scene in "Hair" is dirty I'll hit 'em in the mouth. No, I won't—I have too much love for that after seeing the show. But I might take my clothes off just to prove how UN-dirty it can be.

Source: wiktionary