If they ran this three-minute disclaimer before every porno we ever watched, we'd definitely have healthier sex lives... and never want to actually watch porn. It's the video equivalent of a tub full of ice water, of hearing a twig snap in half-- in other words, the ultimate boner killer.
WARNING: audio is NSFW, although the boring camera setup certainly is. We kept expecting this Gennifer Flowers wannabe to jump on the desk and reveal her sexy stockings. We're guessing this could be why we didn't do so well in sex ed.
Double Viking - 80s PSA That Used To Run Before Pornos
When you're done with that, reward yourself with an ad too cool to ever be topped by any modern television commerical:
Double Viking - Salvador Dali Explains Alka-Seltzer
And one more: Have you been perverted by newsstand obscenity? An (early?) 60s PSA featuring "George Putnam, outstanding news reporter" may be of some assistance...