Tech "K - Effect" (Patreon)

This animation tip is quite particular, it's a montage effect where 2 images gain meaning by intercalate them. Look at those examples using the same character with a quite undefined expression and 3 different images. The hot dog/sausage could result in a appetite expression for food or even phallic things. The guy quickly makes us to think in an eye contact and a romantic or seductive scene. And I think the skull is really obvius what makes her to looks like what she´s thinking in. 

"I want to eat that"; "I want you"; "I wanna kill"; All of that with the same face.

Kuleshov effect (K effect) gets his name from 1910s Soviet film-maker Lev Kuleshov.