
Sit on
Physical Objects
Use 'sit on' when referring to physical objects that can support your weight.

After the long walk, I was happy to sit on a rock.
Public Seating
'Sit on' is commonly used for public seating like benches or steps.

He was sitting on a bench at the bus stop.
Not Always Literal
Sometimes 'sit on' is used figuratively or humorously for unusual seating.

The cat loves to sit on my homework.
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