[sheetjs]

"If you give a mouse a cookie, the mouse will ask for a glass of milk"

[iagooar]

That's a fun expression, first time I hear it! In Polish, you would say "you give a finger, and they'll take the whole hand".

[cutcss]

In many Spanish countries we have a similar one: "le das la mano y agarran el codo", which translates "you give them a hand and they'll grab the elbow".

[vturner]

"Give someone an inch, and they will ask for a mile!"

[analogmemory]

It's the title of a popular children's book :) https://en.wikipedia.org/wiki/If_You_Give_a_Mouse_a_Cookie

[eitland]

Same in Norwegian :-)

[iagooar]

Languages and cultures are such a fascinating thing. How can Polish and Norwegian come up with the same expression, without a shared, common ancestry and the countries not being direct neighbours.

[rosstex]

"Give a man a fish, and he'll ask for two." Wait...

[wzsddtc]

In Chinese it's give people an inch and they would want a foot.

[Clubber]

I like the possibly unintended double meaning of "foot."