Theory first:

I've been thinking lately about how sometimes there's a genetical difference between two or more siblings in a family. I'm not thinking about the obvious differences between them. I'm thinking in terms like health, and general well-being.

Many times I observe younger siblings to be "shadows" of their older siblings. Meaning second-born or later children have worse skin, worse hair, etc.

I think the first time parents have sex, the father is pumped full with free testosterone, because he feels dominant, and feels successful for winning a woman's love (disclaimer: in a bluepill relationship.) Later on as the mother becomes more and more repulsed by the father's behavior (ie: he doesn't live up to the woman's fantasies,) and the father becomes more and more frustrated, sex too becomes a dull thing to do. The man loses testosterone, gets lot's of cortisol instead, he feels less dominant. They have sex, and make a new child, but this time the baby isn't as healthy as the first, or the ones following while the parents were still "in love."

Many times you can see the oldest boy/man is the most succesful, the most outstanding, etc. The whole family adores him, because he is their (potential) leader. The younger siblings are loved, but not in the same way. There are so many examples I could give. You can even see this recurring theme in books, movies, and other fantasies.

The questions:

*Do you know of any scientific research or similar theory reading? If so, please share. *What are your thoughts on this theory? *Your experience?