I am reading a book by DALE CARNEGIE, and I found an interesting lesson about the impact of saying yes.
"When we are talking with people we need not talk on the issue about which our assertions differ, instead keep on emphasizing about the things on which our thoughts are in agreement, and finally, you'll reach the point where your contrasting assertions have already been converted into an agreement".
The psychological patterns here are- When a person says 'NO' and means it, he/she is not just saying the combination of two letters. The organs (glandular, muscular, and nervous) of the person in your opposite gather themselves in a state of refraining, and the whole neuromuscular system sets itself on guard against acceptance.
On the contrary, if a person says yes, none of the organs of the person in your opposite will try to refrain and the person is continuously moving in a state of accepting and open attitude condition.
THANK YOU, HAVE A CHEERFUL DAY.