Nothing freudian about it
It's been shown that our concept of beauty is a fluid one, and is defined by what we see in our environment
Basically, we find average qualities the most attractive
- average height
- average skin colour
- average shape of face
etc
... and this may account for why Americans are still able to reproduce in spite of their national characteristics
Of course being attracted to averages doesn't explain why we are also attracted to opposites - Asain to Western, Western to Asian, etc - that's another dynamic, understandable by reference to our own position in the population
But in terms of what it is we like within our target population, it's the average that draws us.
this by the way is one of the reasons why the crew of the Bounty mutinied ... but that's a longer post that I don't have time for this morning ...