Today's NYC Museum of Sex exhibit (nsfw).

(click image, via flickr)
Well, not today's, it's from 2009. Both books were published in the 1970s. Why did Grace "M" not title her blowjob book "Penis Sucking for everybody"? Women (shakes head). Here's a review of the Pussy Eating book. Yes, we've been there.
Related—Museum of Sex ads: the Blowjob Balloon • Jism • Flaccid.