contourtionism

The obsessive proclivity one may have toward placing objects or body parts into areas that will seemingly accommodate the chosen item's contours while occupying the maximum volume of the empty space.

"The top of my chiweenie's head fits perfectly into my eye socket like a furry little puzzle piece."
"Why do you know that?"
"It's contourtionism; I like to see stuff go together."
"Stuff like mammal meat?"
"Ohhhh yeah."
"Gross. Leave now or we'll see how well my elbow matches your orbit."