Do We Smell the Same Information?

The way that dogs interact with each other, they smell each other's butts because it gives them a huge amount of information. Do humans exchange information the same way? I know we don't smell into their zasses, but I mean, do we exchange on an unconscious level the same amount of information? Well, I couldn't say exactly how much is exchanged in terms of that with odor. We know from visual cues that a lot is picked up,. for example, looking at symmetry and a person's genetic health and well-being.