Sharing

I've been considering the whole concept of sharing recently. Everybody considers sharing a selfless act, but in my introspection I'm beginning to think differently. I'm thinking about a very fine line between giving and sharing, so thusly you could say I'm not quantifying all of sharing, just some of it, and in the case I'm speaking of, it could very well be subconscious, and the person not really be aware of it. Let's dissect sharing.

Lets say that someone shares food with another person. In this simple case the person sharing the food could potentially benefit by means of eventual reciprocation and may be subconsciously conditioned to do so guessing that they will eventually be rewarded for it. My guess is that the person sharing food is likely to do so most when they have more than they need or want, and the likelihood of someone sharing goes down in respect to how much excess of what is to be shared goes down. If their is no excess, or even a deficit, sharing becomes just that less likely.

Maybe there are two kinds of sharing. One where you have more than you need, and you are subconsciously giving away what you don't need for a chance to fulfill a future need, and one where you consciously transcend your normal instinct of self-preservation and you share to your own detriment. The second type seems more noble.