Wide Angle Wednesday:Shapes

Thanks to BobsBlips for running Wide Angle Wednesday.
Shapes (next week it's "nature") sounded an easy theme but I've download 3 lots of photos and none excited me. 

In desperation here is my bookshelf with lots of rectangular shapes. 

I know you will all home in on "The Mating Game" which I've only just noticed there.
FYI It's subtitled "Sex, Love & Courtship in the Zoo" and no doubt dates from my husband's days as a vet student.
I've seen more explicit stuff in blip macros.