Bmet, this is a perfect textbook example of what the Indians (referring to India) have known for about 1,500 years. Have you ever read an original translation of the Kama Sutra, not the postition reduced versions of which there are a lot around?
Vatsyayana classified men and women thousands of years ago into 9 categories, 3 of which were size based, 3 desire based and 3 timing based. In the size part of his classification he never once made anybody more superiour/inferior over the others, they were merely different and he stresses the importance of the correct match.
This I copied from the Project Gutenberg page, it is from the section referring to size.
+--------------------+--------------------+
| EQUAL. | UNEQUAL. |
+--------------------+--------------------+
| MEN. | WOMEN. | MEN. | WOMEN. |
+--------+-----------+--------|-----------+
| | | | |
| Hare. | Deer. | Hare. | Mare. |
| Bull. | Mare. | Hare. | Elephant. |
| Horse. | Elephant. | Bull. | Deer. |
| | | Bull. | Elephant. |
| | | Horse. | Deer. |
| | | Horse. | Mare. |
+--------+-----------+--------+-----------+
(sorry if the formatting goes a bit wonky)
Anybody interested in the book, you can find it for online reading or download at Project Gutenberg under this URL:
http://www.gutenberg.org/ebooks/27827
And congratulations for having such a thoughtful and intelligent (growing) family.
What did Mr Spock used to say? Live long and prosper.