When eating something, nobody likes to have an unpleasant aftertaste. It’s just not a desirable outcome from consuming what you had initially thought to be something worthwhile for your taste buds. I consider it a small risk for a potentially large return (if you appreciate food, then a great tasting bite is utterly satisfying).
The same concept applies to everyday life. Every action, every word, has the potential to produce some sort of aftertaste, or better known as impact. When you come across a less desirable one, you are left with a feeling of uneasiness, depending on the extent or context of the action(s) taken.
Without going on too much of a tangent, one exception that I can think of is related to my mother’s ginseng soup. She periodically makes large batches of ginseng soup for my family because of its health benefits. To give you a sense of what kind of task this is like, the whole process takes her at least six hours. But it’s not just six hours of leave-it-and-forget-it simmering or braising like you do with a slow cooker – it involves some labor-intensive cleaning, chopping, draining, filtering, and cooling. Not only does it consume enormous amounts of time and manpower to prepare, but it is also relatively costly. What amazes me is that she does this without any complaint (in fact, she is proud that she is able to make it). However, the one catch is that the ginseng soup has a bitter and foul aftertaste despite its noteworthy toil and sweat in the making. I truly do not enjoy drinking it, but I drink it anyway because of its onerous journey to reach my cup. The aftertaste is always far from pleasant (you can see it in my face), but it certainly has genuinely good intentions. She only wants the best for her loved ones, and the best is what she provides.
Not all aftertastes are going to be pleasant, but you learn to recognize the ones that serve you well. For the ones that don’t, then you can simply swallow it down as is and move on.