Interesting article, but I hypothesize about the origins differently. Why do men have external penises? Part of the external physicality and "emphasis" in our

Interesting article, but I hypothesize about the origins differently. Why do men have external penises? Part of the external physicality and "emphasis" in our anatomy is as a mutual pleasure seeking signal. The idea of erogenous zones is what is attractive in both breasts and penises. It's the fact that the person can be sexually stimulated, which in turn can lead to joint sexual stimulation (and side effects related to reproduction). It's why fundamentally a sensitive, healthy breast is most attractive (not necessarily the size). It's a biological part of the reason of why we project our own desires onto other people. Hormones are strong in most men and women (and have other network effects with precocity and resource accumulation/survival).