It’s an open empanada

I don’t know, how many wheels?

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I believe he’s taking the question literally, as op asking for some universal truth instead of what each one of us finds personally irresistible.

Or fridge doors closing properly.

In my town in the summer, there’s a spot where just after sunset you can see the flocks of swallows retreating from the fields while flocks of bats arrive from the other side. It is cool to see.

Ratpenat in Catalan, winged rat.

In my language they are called “ratapinyada” or “ratpenat” from the latin for winged rat.