The photo is a good illustration of an interesting phenomenon we've observed many times: cofounders start to look alike.
1. The less dominant personality emulates the dominant personality. 2. People that spend a lot of time together form similar habits and interests. Ever noticed how many guys in corporate america like the same thing? 3. People that spend a lot of time together engage in common consumption. For example, one person with bad eating habits will cause others to gain weight.