This is a high level discussion of how I achieved certain effects in Succulent using Unity. It spoils the game, so I recommend you play it and/or read my artist's statement.
To the game engine, the popsicle (or "ice lolly" or corn dog) in Succulent is the main director for the entire scene. It is essentially a psychic telekinetic popsicle that dictates music playback, effects, and character animations... The popsicle is god. Love the popsicle.
To many developers, the most obvious straightforward way to achieve this popsicle-sucking interaction would've been to create a hand / arm controller, and then parent the popsicle to the dude's hand. But this "direct" way would've been the wrong way; this game is about popsicles, not about hands. Tuning the hand and arm movements necessary to pilot it into his mouth -- it would've been painful and unnecessary. (This is why it's important to have a fairly solid concept before you start coding something. The concept and design will affect how you code it!)