Just repeating my statement: "There's a lot of similarities. That's why my friend and I could discuss and compare, there's a commonality of experience."
This is pretty much what we do to determine if the experience is defined by the concept we use to communicate it. We can't give another our exact experience, of colors, for example, so there's limits; but, humans infer that human experience is similar, color-blind anomalies aside.
An example I use a lot is taste. We have the concept "sweet taste." I don't know for certain that sweet is the same to you as to me, and it's very difficult, if not impossible to give the knowledge of "sweet" to someone else. But if a whole lot of people taste sugar and say "that's sweet" we infer we're talking about the same taste, same sense experience.
The further away human experience is from reducibility to sense knowing, the more difficult it becomes. Love is that way. And there are different kinds of love and we use different names and descriptions. Like the eskimos with snow, perhaps.
So, I think we have a range of fuzzy factors, but not complete error.
Thanks for your reply.
But that's where the error lies. When we taste sugar we are told its "sweet". We are told vinegar is "sour". It's a learned response. It's doesn't mean we all experience it the same way.
Some people hate sugar and love vinegar. Women have a particular preference for chocolate which seems to be more than what it does for men. Others seem to really like the experience of alcohol while other hate it, etc.
Taste—in fact all experience—can be reduced to to three categories: pleasant, unpleasant, neutral. Depending how we experience something will determine not only our immediate response to it but also whether we are likely to seek to repeat it, avoid it or never think about it.
Approach-avoidance behavior says a lot about who we are and how we are put together, as well as what our present state is.
Concepts such as love, justice, truth, divine, eternal, etc. are not absolute values. They cannot be verbalized, described or visually represented. They are abstractions.
Sometimes our "common experience" is cultural. We are conditioned to respond within the confines of our cultures. For example grief, or happiness are often culturally defined responses.
As for love being something we experience in common, let's not forget that a sadist and a masochist make a "perfect" couple, yet we know they experience their love hardly the same way. :)