Domination and submission on line

I was thinking about why a dominant/submissive relationship that is online only can be so very good.

If I (for example) kiss you (for example) in an online chat, it can feel wonderful if we have good imaginations, but it isn't really happening.

But if you (for example) dominate me (for example), the dominance and submission are really happening. I really am giving over some power to you, you really are taking some control over me.

D/S is perfect for an online / long-distance relationship because the central "sex act", the exchange of power, is as real as it would be anywhere.