Convergences: What We See When We Remember Keyholes in Covers

I'm very much looking forward to reading Peter Mendelsund's What We See When We Read. Mendelsund is a terrific book designer, so his thoughts on what happens to our brain on books -- what we visualize -- should be fun. (Here's an excerpt that touches on Anna Karenina.) I was also surprised when I saw the cover for his book:

Because here's the first thing it reminded of:

About which you can read here or here. 

The keyhole motif is not that uncommon -- here's what Google Images pulls up when you do the search -- but to the question, What do you see when you look at the cover for What We See When We Read? The answer is: A former ballerina's book-length memoir about a particular sexual act.