An Unfortunate Occurance

I wonder... how often does one person ask another if the other would like to partake in an activity in which the former has little interest but only asks out of generosity to the latter? Or, how often do we offer another some of our food, hoping that the person will say no? Am I the only one? Such a happening, especially the first, is unfortunate. One person asks another disingenuously to partake in an activity. Let's say the second person, thinking the first earnestly wants to engage in activity with one yet is uninterested oneself, consents out of magnanimity because that person thinks it will make the other happy. But it doesn't make either party happy, as each is only doing it for the sake of the other, with true intentions concealed in their hearts. I wonder how often this occurs. I wonder how disingenuous or sincere people are? Of course, one can't generalize for all the time, but I wonder what percentage of people, across and within cultures, are disingenuous in their dealings with others. What does this portend for our impressions of others, if they are built on falsehoods, albeit with good intentions? I'm not so miserably cynical and misanthropically pessimistic as to follow this vein of thought to its end, but the question itself is worth asking...