Why doesn’t NaCl satisfy our thirst when drinking it?

Because it will cause you to urinate more

Explanation:

Salt like NaCl will turn into ion when absorbed. These ions will increase the osmotic pressure of the blood and in turn, will takes water around. If the volume of blood keeps increasing, it will increase the burden of heart to pump blood too. Ion also can alter electrolyte concentration and This condition can be dangerous if left without a response. The human body will try to eliminate the NaCl by filtering it using a kidney. But NaCl will take away water molecule so it increases the volume of urine you produce.  

If the concentration of NaCl from the solution you drink is higher than the concentration of NaCl of the urine, you remove more water via urine than gain it from drinking.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.