It's seems like polite

Since childhood, we had been taught to be polite all the time. Of course, we practiced to say please and thank you when request and get something from the others. However, have you ever heard about some words like this:

" PLEASE take that for me, THANK YOU. "

Yes, we just feel like normal whenever hearing the others ask you to do this and that with a please and thank you. Here the question is, will you reject such "polite" request?

For sure, you will not reject, or in the other words, you might not know how to reject due to embarrassing. This scenario would let you be in the hot water especially when your friend ask you to do something that you are not willing to do.

Let's think deeper about this, don't you think that saying thank you in prior is actually a kind of forcing someone to do something that he or she is not willing to do? Shall we speak this sentence out loudly to answer those kind of request which seems like polite:

How if I say I don't want?