I wonder how Freud could ever rise to this terminology of penis envy. Such envy is more likely to be formulated by adults. (Young) children accept the differences between people without thinking, and envy can probably only develop if it is suggested to them. Nor is womb envy - amusement - a conclusive argument for any envy of women's ability to bear children. You are right :)
I opened some of the sources you offered but I still cannot make sense of the exploitation of those imprinted genes which cause the mother of the child to exhaust herself so she won't have any other children but those from the one man which was successful in this imprinting process. What does "exhausting" mean in this context? Is there any time frame involved? I really don't get it.
Sometimes language seems to come into the way and gets me biased or influenced how biologists explain what genes do in very much social terms.